A remark on uniqueness criteria for initial value problem Zuzana Došlá, Ondřej Došlý (1989) Commentationes Mathematicae Universitatis Carolinae Similarity:
Euler polygons and Kneser's theorem for solutions of differential equations in Banach spaces Bogdan Rzepecki (1982) Commentationes Mathematicae Universitatis Carolinae Similarity: