He had remained interested in collaborating with Kuratowski and, in the same year as his doctorate was awarded, a joint paper by Marczewski and Kuratowski was published in Fundamenta Mathematicae.
Siya ay may naiiwan na interesado sa nakikipagtulungan sa Kuratowski at, sa parehong taon bilang kanyang titulo ng doktor ay iginawad, ang isang papel sa pamamagitan ng pinagsamang Marczewski at Kuratowski ay nai-publish sa Fundamenta Mathematicae.