found: Roggeveen, Job. Who did that?, 2018:title page (text and illustrations: Joris)
found: National Library of the Netherlands via VIAF, Oct. 11, 2018(est. hdg.: Joris, 1980-; Oprins, Joris)
found: Wikipedia, Oct. 11, 2018(Joris Oprins, born 1980 in Tilburg, animation director, studied at the Design Academy Eindhoven in the Netherlands, graduated in 2003, in 2005 he worked as an animator on the stop motion children series Miffy at studio Pedri in Ankeveen)
found: Internet Movie Database, Oct. 11, 2018(Joris Oprins, director, writer, producer)