The role of semigroups in the elementary theory of numbers Štefan Schwarz (1981) Mathematica Slovaca Similarity:
An unconventional problem in the elementary theory of numbers Štefan Schwarz (1981) Czechoslovak Mathematical Journal Similarity:
Convolution semigroup of measures on compact noncommutative semigroups Štefan Schwarz (1964) Czechoslovak Mathematical Journal Similarity: