 Her collaboration with Jean Weigle, who returned to Geneva every summer, is demonstrated their by regular correspondence archived at Caltech and by numerous publications.It was Grete Kellenberger who gave Werner Arber, who carried out his PhD between 1954 and 1958, the conceptual basis and practices for his future studies in the genetics of bacteriophages.Grete Kellenberger published several articles with Arber between 1957 and 1966.