@Incollection{, title = {Quelques souvenirs des ann{\'e}es 1925{\textendash}1950}, author = {Rham, Georges de}, booktitle = {Cahiers du S{\'e}minaire d{\textquoteright}Histoire des Math{\'e}matiques, 1 (French)}, year = {1980}, publisher = {Inst. Henri Poincar{\'e}, Paris}, pages = {19{\textendash}36} }