He was also a radio personality known for his causeries, and a literary critic. She has also held causeries in NRK radio. Sainte-Beuve, in the "Causeries du lundi", vol. In 1970 Vainio started writing causeries with Gunnar Mattsson. See Sainte-Beuve, "Causeries du lundi", vols. Sainte-Beuve called the now-famous collection "Causeries du lundi" ("Monday Chats").