[1] Campanato S.:
Equazioni ellittiche del II$^o$ ordine e spazi ${\Cal L}^{2,\lambda}$. Ann. Mat. Pura Appl. (4) 69 (1965), 321-381.
MR 0192168
[2] Campanato S.:
Maggiorazioni interpolatorie negli spazi $H^{m,p}_{\lambda}(Ømega)$. Ann. Mat. Pura Appl. (4) 75 (1967), 261-276.
MR 0216284
[3] Campanato S.:
Sistemi Ellittici in forma divergenza. Regolarità all' interno. Quaderni Scuola Normale Superiore Pisa, Pisa, 1980.
MR 0668196 |
Zbl 0453.35026
[4] Campanato S.:
A maximum principle for non-linear elliptic systems: boundary fundamental estimates. Adv. in Math. 66 (1987), 291-317.
MR 0915857
[5] Cannarsa P.:
On a maximum principle for elliptic systems with constant coefficients. Rend. Sem. Univ. Padova 64 (1981).
MR 0636627 |
Zbl 0473.35016
[6] de Giorgi E.:
Sulla differenziabilitá e l'analiticità delle estremali degli integrali multipli regolari. Memorie dell'Accademia delle Scienze di Torino, Serie 3, 3(I) (1957).
Zbl 0084.31901
[7] de Giorgi E.:
Un esempio di estremali discontinue per un problema variazionale di tipo ellittico. Boll. Un. Mat. Ital. (4) 1 (1968), 135-137.
MR 0227827
[8] Giaquinta M.:
Multiple Integrals in the Calculus of Variations and Nonlinear Elliptic Systems. Annals of Math. Studies, Princeton University Press, Princeton, 1983.
MR 0717034 |
Zbl 0516.49003
[9] Gilbarg D., Trudinger N.S.:
Elliptic Partial Differential Equations of Second Order. second edition., Springer, 1983.
MR 0737190 |
Zbl 1042.35002
[10] Kalita E.:
On the Hölder continuity of solutions of nonlinear parabolic systems. Comment. Math. Univ. Carolinae 35.4 (1994), 675-680.
MR 1321237 |
Zbl 0814.35011
[11] Koshelev A.I.:
Regularity Problem for Quasilinear Elliptic and Parabolic Systems. Springer, 1995.
MR 1442954 |
Zbl 0847.35023
[12] Kottas J.:
Interior regularity for the quasilinear elliptic systems with nonsmooth coefficients. Comment. Math. Univ. Carolinae 28.1 (1987), 95-102.
MR 0889771
[13] Kottas J.: Regularita slabých řešení eliptických úloh. Thesis of Dissertation, Charles University, Prague, 1990.
[14] Kufner A., John O., Fučík S.:
Function Spaces. Noordhoff Int. Pub. Leyden, Academia Prague, 1977.
MR 0482102
[15] Leonardi S.:
On constants of some regularity theorems. De Giorgi's type counterexample. Math. Nachr. 192 (1998).
MR 1626336 |
Zbl 0909.35030
[16] Leonardi S.:
Remarks on the regularity of solutions of elliptic systems. Kluwer Academic/ Plenum Publishers, New York, 1999.
MR 1727457 |
Zbl 0952.35034
[17] Maz'ya V.G.:
Examples of nonregular solutions of quasilinear elliptic equations with analytic coefficients. Funktsional'nyi Analiz. i Ego Prilosheniya 2 (1968).
MR 0237946 |
Zbl 0179.43601
[18] Meyers N.G.:
An $L^p$ estimate for the gradient of solutions of second order elliptic divergence equations. Ann. Scuola Norm. Sup. Pisa, (3) 17 (1963).
MR 0159110
[19] Miranda C.:
Istituzioni di Analisi Funzionale Lineare. U.M.I. 1978.
Zbl 0697.46002
[20] Nečas J.:
Les Méthodes Directes en Théorie des Équationes elliptiques. Masson et Cie, Éditeurs, Paris, 1967.
MR 0227584
[21] Nečas J.: On the regularity of weak solutions to nonlinear elliptic systems of partial differential equations. Lectures at Scuola Normale Superiore, Pisa, 1979.
[22] Nečas J.:
Introduction to the Theory of Nonlinear Elliptic Equations. Teubner-Texte Math., Leipzig, 1983 or J. Wiley, Chichester, 1986.
MR 0874752
[23] Nečas J., Stará J.:
Principio di massimo per sistemi ellittici quasi lineari non diagonali. Boll. Un. Mat. Ital. (4) 6 (1972), 1-10.
MR 0315281