• M. Golubitsky and B. Rothschild. Primitive subalgebras of exceptional Lie algebras. Pac. J. Math. 39 (2) (1971) 371-393. [Abstract] [PDF 2.1M]
• M. Golubitsky and B. Rothschild. Primitive subalgebras of exceptional Lie algebras. Bull. AMS. 77 (6) (1971) 983-986. [Abstract] [PDF 328K]