A note on a paper of Oppenheim and Šalát concerning series of Cantor type Jaroslav Hančl (2002) Acta Mathematica et Informatica Universitatis Ostraviensis Similarity:
Rational and irrational series consisting of special denominators Jaroslav Hančl (2001) Acta Mathematica et Informatica Universitatis Ostraviensis Similarity:
A note on a linear programming problem Jaromír Abrham (1957) Czechoslovak Mathematical Journal Similarity: