As well as his supervisor he was greatly influenced by Sierpinski who was appointed to the university in 1919 and began to work closely with Mazurkiewicz, Saks' supervisor.
Pati na rin ang kanyang superbisor siya ay naiimpluwensyahan ng malaki Sierpinski na ay hihirangin upang angkinin ang unibersidad sa 1919 at nagsimulang magtrabaho sa malapit sa Mazurkiewicz, Prinsipe 'superbisor.