McCormick Gallery (Chicago) and Vallarino Fine Art (New York) showed work by Jack Tworkov and Perle Fine at Expo Chicago 2016.
Tworkov, a founding member of the New York School. He was born in Poland and came to the United States at the age of 13. He was, and is, an important part of the Abstract Expressionist movement. He apparently initially wanted to be a writer, and indeed studied English at Columbia University, but was inspired by the work of Impressionist artists and turned to painting. You can find a great deal more out at jacktworkov.com.
Fine is another important Abstract Expressionist painter. As a woman she had a higher bar--actually an insurmountable bar--to be considered, in her time, as an equal to male painters. She studied at the Art Students League and joined Hans Hoffman's school. It was a rare thing for a major museum to promote a woman artist but the Guggenheim did so for Fine. She was sponsored by Willem de Kooning and accepted as one of the first women to be a member of the 8th Street Club (Tworkov was also a member). You can find out more about her at perlefine.com.