A mixed computer technique for solving the transportation problem in linear programming

von Hejl, Luboš J.
Veröffentlicht in Czechoslovak economic papers (1966)

Dictatorship of the proletariat : a Slavic model for the non-Slavic world

von Hejl, Lubos J.
Veröffentlicht in Change and adaptation in Soviet and East European politics (1976)