Here is a short text that you can find on Wikipedia on Baljeu:
Joost Baljeu was born in Middelburg on 1 November 1925. During World War II (1939–45) he began painting in an expressionist, realistic and semi-abstract idiom. After Cubism he evolved to constructivism. He made his first reliefs in 1954-55. From 1957 to 1972 he was a professor at the Royal Academy of Art, The Hague in the Hague. The Canadian artist Eli Bornstein began to make three-dimensional “structurist” reliefs during a sabbatical in Italy and the Netherlands in 1957.[ He met and was influenced by artists such as Jean Gorin, Joost Baljeu, Anthony Hill, Kenneth Martin, Mary Martin, Victor Pasmore and Georges Vantongerloo.
I truly began to appreciate his works just some 10 years ago at the time i first visited a gallery on dutch Modern Art. The art dealer had at that time 2 large wall sculptures by Baljeu, which were not only very impressive, but unfortunately much too expensive to acquire.
Because i had seen these, i was spoiled and never wanted to focus at something much smaller. The admiration remained , but no additions were made to our collection of Modern Art. Still www.ftn-books.com has some excellent and highly collectable Baljeu publications for sale.