Check this out:
American Art Magazine
"George Bellows's Stag at Sharkey's: Boxing, Violence, and Male Identity." Robert Haywood. American Art 2:2 (Spring 1988)
Smithsonian Magazine
Title: "The boy who chose the brush over baseball"
Date: June 1992
Pages: 58-71
Author(s): Bennett Schiff
TIME Magazine
"A Passion For Islands." Robert Hughes. Time (August 3, 1992).