Set of 3 drawings, outsider art, Jean-Baptiste Blanpain, 1980s

A set of three coherent and interesting works, created with felt tip or marker in the 1980s. A colourful geometric abstraction for two of them, and a very stylised portrait for the third. Titles borrowed from the vocabulary of comics. They bear an identical monogram (JP?) and are attributed on the back to JM Blanpain, which does not seem consistent to me. The artist therefore remains to be precisely defined. Overall good condition of the whole, a real favourite.