Complex sentence: Atkey has taught law at the University of Western Ontario, Osgoode Hall Law School and the University of Toronto and wrote "Canadian Constitutional Law in a Modern Perspective" which was a popular constitutional law textbook in the 1970s.
Split into simpler sentences: Atkey has taught law at the University of Western Ontario, Osgoode Hall Law School and the University of Toronto. He wrote "Canadian Constitutional Law in a Modern Perspective" which was a popular constitutional law textbook in the 1970s.