[1] Agarwal R. P.: Nonlinear two point boundary value problems. Ind. J. Pure Appl. Math. 4, 1973, 757-759. MR 0369787

[2] AgarwaL R. P.: Two-point problems for non-linear third order differential equations. J. Math. Phys. Sci.8, 1974, 571-576. MR 0430380 | Zbl 0297.34013

[3] Agarwal R. P., Krishnamoorty P. R.: On the uniqueness of solutions of nonlinear boundary value problems. Ibid. 10, 1, 1976, 17-31.

[4] AgarwaL R. P.: Improved error bounds for the Picard iterates. Ibid. 12, 1, 1978, 45-48. MR 0488773 | Zbl 0388.34009

[5] AgarwaL R. P., Krishnamoorty P. R.: Existence and uniqueness of solutions of boundary value problems for third order "nonlinear differential equations. Proceed. Ind. Acad. Sci. 88A, 2, 1979, 105-113. MR 0548973

[6] Agarwal R. P.: On the boundary value problems for $y''' = f(x,y,y',y'')$. Bull. Inst.-Math. Acad. Sinicә 12, 1984, 153-157. MR 0765109

[7] Andres J.: Higher kind periodic orbits. Acta UPO 88, Phys. 26, 1987 (in print).

[8] Barr D., Sherman T.: Existence and uniqueness of solutions of three-point boundary value problems. J. Diff. Eqs. 1З, 1973, 197-212. MR 0333326 | Zbl 0261.34014

[9] Bebernes D., Gaines R., Schmitt K.: Existence of periodic solutions for third and fourth order ordinary differential equations via coincidence degree. Ann. Soc. Sci. Bruxelles 1, 88, 1974, 25-36. MR 0340729 | Zbl 0286.34056

[10] Bespalova S. A., Klokov, Yu. A.: A three-point boundary value problem for a nonlinear third order ordinary differential equtions. (in Russian), Diff. Urav. 12, 6, 1976, 963-970. MR 0425230

[11] Caristi G.: A three-point boundary value problem for a third order differential equation. B.U.M.I. C4, 1, 1985, 259-269. MR 0805218 | Zbl 0591.34013

[12] Das K. M., Lalli B. S.: Boundary value problems for $y''' = f(x,y,y',y'')$. J. Diff. Eqs. 81, 1981, 300-307. MR 0622819 | Zbl 0465.34012

[13] Goecke D. M., Henderson J.: Uniqueness of solutions of right focal problems for third order differential equations. Nonlin.Anal. 8, 3, 1984, 253-259. MR 0738010 | Zbl 0534.34024

[14] Hamedani G. G., Mehri B.: Boundary values problems for certain non-linear third order differential equations. Rev. Roum. Math. Pures Appl. 22, 3, 1977, 315-319. MR 0454130

[15] Henderson J.: Existence and uniqueness of solutions of right focal point boundary value problems for third and fourth order equations. Rocky Mount. J. 14, 2, 1984, 487-497. MR 0747295 | Zbl 0542.34014

[16] Jackson L., Schrader K.: Subfunctions and third order differential inequalities. J. Diff. Eqs. 8, 1970, 180-194. MR 0257525 | Zbl 0194.40902

[17] Jackson L., Schrader K.: Existence and uniqueness of boundary value problems for third order differéntial equations. Ibid. 9, 1971, 46-54. MR 0269920

[18] Jackson L.: Existence and uniqueness of solutions of boundary value problems for third order differential equations. Ibid. 13, 1973, 432-437. MR 0335925 | Zbl 0256.34018

[19] Jackson L.: Existence and uniqueness of solutions of boundary value problems for Lipschitz equations. Ibid. 32, 1, 1979, 76-90. MR 0532764 | Zbl 0407.34018

[20] Kiguradze I. T.: Some singular boundary value problems for ordinary differential equations. (in Russian). Izdat. Tbil. Univ., Tbilisi 1975, pp.201-209. MR 0499402

[21] Klaasen G.: Differential inequalities and existence theorems for second and third order boundary value problems. J. Diff. Eqs. 10, 1971, 529-537. MR 0288397 | Zbl 0218.34024

[22] Klokov, Yu., Pospelov L. N.: Conditions for a priori boundedness of solutions of boundary value problems for third order equations. (in Russian). Diff. Urav. (Rjazan) 9, 1977, 48-56.

[23] Konstantinov M. S.: Existence of periodic solutions to some differential equation. (in Russian). Diff. Urav. (Rjazan) 9, 1977, 48-56. MR 0486815

[24] Lepina E. I., Lepin A. Ya.: Existence of a solution of a three-point boundary value problem for a third order ordinary differential equation. (in Rus- sian). Latv. Math. Yearbook 4, Izdat. Zinatne, Riga 1968, 247-256. MR 0239174

[25] Mawhin J.: Topological degree methods in nonlinear boundary value problems. CBMS Reg. Conf. Math. 40, AMS, Providence 1979. MR 0525202 | Zbl 0414.34025

[26] Mehri B.: Boundary value problem for certain non-linear third order differential equations. Rev. Roum. Math. Pures Appl. 19, 1974, 773-776. MR 0357945 | Zbl 0292.34017

[27] Murthy K. N., Rao D. R. K. S.: On the existence and uniqueness of solutions of two and three-point boundary value problems. Bull. Calcutta Math. Soc. 73, 3, 1981, 165-172. MR 0669619

[28] Pospelov L. N.: Necessary and sufficient conditions for the existance of a solution of a certain boundary value problems for a third order nonlinear ordinary differential equations. (in Russian). Latv. Math. Yearbook 8, Izdat. Zinatne, Riga 1970, 205-212. MR 0279375

[29] Pospelov L. N.: A certain estimate of the solutions of a third order equation. (in Russian). Ibid. 12, 1973, 135-140. MR 0357947

[З0] Pospelov L. N.: The uniqueness of solutions of certain boundary value problems for third order differential equations. (in Russian). Ibid. 14, 1974, 177- 186. MR 0361252

[З1] Rusnák J.: A three-point boundary value problem for third order differential equations. Math. Slovaca 13, 3, 1983, 307-320. MR 0713954

[32] Schrader K.: Second and third order boundary value problems. Proceed. Amer. Math. Soc. 32, 1972, 247-252. MR 0291548 | Zbl 0212.11303