@ARTICLE {, title = {Penneyove hry a ich zovšeobecnenie}, author = {Krech, Ireneusz}, journal = {Obzory matematiky, fyziky a informatiky}, year = {2007}, volume = {36}, number = {2}, pages = {1--7}, issn = {1335-4981}, abstract = {We deal with countable probability spaces considered as stochastic models of multistage experiments, where the number of stages is random. Using various elementary approaches, we determine the corresponding probability functions.}, }