Zovšeobecnenia Bihariho lemy a ich aplikácie.
(Slovak) [Generalizations of Bihari's Lemma and their Applications].Matematický časopis,
vol. 20
(1970),
issue 3,
pp. 225-232
[1] Bihari I.: A generalization of a lemma of Bellman and its applications of uniqueness problems of differential equations. Acta Math. Hung. 7 (1956), 81-94. MR 0079154