Check this out:
TIME Magazine
"The Best and Worst of Warhol." Robert Hughes. Time (February 13, 1989).
Articles about Pop Art in general:
TIME Magazine
"When the Easel Went POP." Robert Hughes. Time (August 16, 1993).
"Wallowing in the Mass Media Sea." Robert Hughes. Time (October 28, 1991).
"Upstairs and Downstairs at MOMA." Robert Hughes. Time (October 22, 1990).
"Mucking with Media." Robert Hughes. Time (December 25, 1989).