On the relationship between the initial and the multipoint boundary value problems for n -th order linear differential equations with delay Alexander Haščák — 1990 Archivum Mathematicum
A strong convergence in L p and upper q -continuous operators Alexander Haščák — 1988 Czechoslovak Mathematical Journal
Tests for disconjugacy and strict disconjugacy of linear differential equations with delays Alexander Haščák — 1989 Czechoslovak Mathematical Journal
Disconjugacy and multipoint boundary value problems for linear differential equations with delay Alexander Haščák — 1989 Czechoslovak Mathematical Journal
Fixed point theorems for multivalued mappings Alexander Haščák — 1985 Czechoslovak Mathematical Journal
Integral equivalence between a nonlinear system and its nonlinear perturbation Alexander Haščák — 1984 Mathematica Slovaca
Integral equivalence of two systems of differential equations Alexander Haščák; Marko Švec — 1982 Czechoslovak Mathematical Journal
Asymptotic and integral equivalence of multivalued differential systems Ján Futák; Alexander Haščák — 1995 Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
Sixty years of Professor Valter Šeda Milan Gera; Alexander Haščák — 1992 Czechoslovak Mathematical Journal