I can't say for Astérix. For Hergé, the author of Tintin, he did start his career by doing publication in newspapers: https://en.wikipedia.org/wiki/Herg%C3%A9#T

I can't say for Astérix. For Hergé, the author of Tintin, he did start his career by doing publication in newspapers: https://en.wikipedia.org/wiki/Herg%C3%A9#Totor_and_early_career:_1925%E2%80%9328 https://en.wikipedia.org/wiki/Herg%C3%A9#Totor_and_early_car... It's quite interesting to observe then all the changes that happened between the multiple publication of the same story: https://tintinomania.com/tintin-dans-ses-cases https://tintinomania.com/tintin-dans-ses-cases