[1] E. ASPLUND: Averaged noms. Israel Journ. of Math. 5 (1967), 4, 227-233. MR 0222610

[2] S. BANACH: Théorie des opérations linéaires. Warsaw, 1932. Zbl 0005.20901

[3] M. S. BRODSKIJ D. P. MILMAN: O centre vypuklogo množestva. Dokl. Ak. Nauk SSSR 59 (1948), 837-840. MR 0024073

[4] A. BRØNDSTED: Conjugate convex functions in topological vector spaces. Mat. - Fys. Medd. Dansk. Vid. Selsk. 34 (1964), 2. MR 0166580

[5] D. F. CUDIA: Rotundity. Proceedings of Symp. in Pure Math., VII, 1963, 73-97. MR 0155166 | Zbl 0141.11901

[6] D. F. CUDIA: The geometry of Banach spaces. Smoothness. Trans. of the Am. Math. Soc. 110 (1964), 284-314. MR 0163143 | Zbl 0123.30701

[7] M. M. DAY: Reflexive Banach spaces not isomorphic to uniformly convex spaces. Bull. Am. Math. Soc. 47 (1941), 313-317. MR 0003446 | Zbl 0024.41401

[8] M. M. DAY: Strict convexity and smoothness of normed spaces. Trans. of Am. Math. Soc. 78 (1955), 516-528. MR 0067351 | Zbl 0068.09101

[9] M. M. DAY: Normed linear spaces. Ergeb. Math. Gr. (N. F.) no. 21, Springer, Berlin 1958, Russian translation, Moscow 1961. MR 0094675 | Zbl 0082.10603

[10] M. I. KADEC: O prostranstvech izomorfnych lokalno ravnomerno vypuklym prostranstvam. Izv. vysš. uč. zav. Matem. 1 (8) (1959), No. 6, 51-57 and 1 (20) (1961), 6, 186-187. MR 0126692

[11] M. I. KADEC: Uslovija differencirujemosti normy Banachova prostranstva. Uspechi Matem. nauk T XX, 3, 123, 183-187.

[12] M. I. KADEC: Oslaboj i silnoj schodimosti. Dokl. Ak. Nauk SSSR 122 (1958), 13-16.

[13] V. L. KLEE: Mappings into normed linear spaces. Fundamenta Math. XLIX (1960), 25-34. MR 0126690 | Zbl 0117.08303

[14] V. L. KLEE: Convex bodies and periodic homeomorphisms in Hilbert space. Trans. Am. Math. Soc. 74 (1953), 10-43. MR 0054850 | Zbl 0050.33202

[15] V. L. KLEE: Some new results on smoothness and rotundity in normed linear spaces. Math. Ann. 139 (1959), 51-63. MR 0115076 | Zbl 0092.11602

[16] A. R. LOVAGLIA: Locally uniformly convex Banach spaces. Trans. of Am. Math. Soc. 78 (1955), 225-238. MR 0066558 | Zbl 0064.35601

[17] G. RESTREPO: Differentiable norms in Banach spaces. Bull. Am. Math. Soc. 70 (1964), 413-414. MR 0161129

[18] V. L. ŠMULJAN: On some geometrical properties of the unit sphere in the space of the type (B). Mat. Sb. (N. S.) 6 (48) (1939), 77-94. MR 0001458

[19] V. L. ŠMULJAN: Sur la dérivabilité de la norme dans l'espace de Banach. Dokl. Ak. Nauk SSSR (N. S.) 27 (1940), 643-648. MR 0002704

[20] V. L. ŠMULJAN: O nekotorych geometričeskich svojstvach sfery v prostranstvach tipa B. Dokl. Ak. Nauk SSSR 24 (1939), 647-651.

[21] V. L. ŠMULJAN: Sur la strucrture de la sphère unitaire dans l'espace de Banach. Mat. Sb. 9 (1941), 545-572.

[22] R. VÝBORNÝ: O slabé konvergenci v prostorech lokálně stejnoměrně konvexních. Časopis pro pěstování matem. (ČSSR) 81 (1956), 352-353.

[23] V. ZIZLER: Banach spaces with the differentiable norms. Comment. Math. Univ. Carolinae 9, 3 (1968), 415-440. MR 0246121 | Zbl 0182.45105

[24] V. ZIZLER: One theorem on rotundity and smoothness of separable Banach spaces. Comment. Math. Univ. Carolinae 9, 4 (1968), 637-640. MR 0256139