Important, but not very well known outside Belgium is Floris Jespers, Friend and contemporary artist to Paul van Ostaijen , Jespers became one of the more important artists in the Interbellum. I personally think that the works he made in that period are less appealing and important than the other artists from Belgium made in Belgium in the period between WWI and WWII, one exception….i love the paintings he made of the people he painted in the Congo. The Congo was a colony of Belgium and Jespers travelled three times from 1951-1955 this country and made some wonderful authentic paintings influenced by the people and landscapes of an impressive country.
http://www.ftn-books.com has recently added some books on Jespers to its inventory.