Han døde i august 2020 i an alder av 80 år av covid-19.[7]
Skrifter
Arithmetic Groups, Lecture Notes in Mathematics 789, Springer Verlag 1980 (Vorlesungen am Courant Institute 1971)
Conjugacy classes in semisimple algebraic groups, AMS 1995
Introduction to Lie Algebras and Representation Theory, Springer Verlag, Graduate Texts in Mathematics, 1972, 7. opplag 1997 (også oversatt til kinesisk og russisk)
Linear Algebraic Groups, Graduate Texts in Mathematics, Springer Verlag 1974, 1998 (også på russisk)
Ordinary and modular representations of Chevalley groups, Springer Verlag 1976
Modular representations of finite groups of Lie type, London Mathematical Society Lecture Note Series 326, Cambridge University Press 2006
Reflection groups and Coxeter Groups, Cambridge University Press 1990
Representations of semisimple Lie algebras in the BGG category , AMS 2008
Modular representations of simple Lie algebras, Bull. Amer. Math. Soc. (N.S.), Band 35, 1998, S. 105--122.
Modular representations of classical Lie algebras, Bull. Amer. Math. Soc., Band 76, 1970, 878--882
Algebraic groups and modular Lie algebras, Memoirs AMS 71, 1967
Hilbert's fourteenth problem, Amer. Math. Monthly, Band 85, 1978, 341--353
Representations of SL(2,p), Amer. Math. Monthly, Band 82, 1975, 21--39
Highest weight modules for semisimple Lie algebras, i: Representation Theory I, Lecture Notes in Mathematics 831, Springer Verlag 1980, S. 72--103