1 - Group actions and vector fields : proceedings of a Polish-North American seminar held at the University of British Columbia January 15 - February 15, 1981 |
2 - Invariant theory, old and new : lectures given at the University of Washington in 1967 |
1 - Group actions and vector fields : proceedings of a Polish-North American seminar held at the University of British Columbia January 15 - February 15, 1981 |
2 - Invariant theory, old and new : lectures given at the University of Washington in 1967 |