Cathy et Pif-Paf (Lisette)
M. Gellens was a cartoonist and comic artist for Lisette magazine in the 1950s. He illustrated comic series like 'Cathy et Pif-Paf', that appeared on the magazine's back cover, and the one-pagers 'Nouky'. He was also present in the Fleurus magazine Ames Vaillantes with 'Chouquette'.
Chouquette aime la Charcuterie (Ames Vaillantes #22, 1/6/1958)