1. D. J. Rowe, J. Math. Phys. 25, 2662 (1984) D. J. Rowe, G. Rosensteel, and R. Gilmore, J. Math. Phys. 26, 2787 (1985);
2. R. LeBlanc and D. J. Rowe, J. Phys. A: Math. Gen. 18, 1891, 1905 (1985); and 19, 1083 (1986).
3. J. Deenen and C. Quesne, J. Math. Phys. 25, 1638, 2354 (1984); C. Quesne, J. Math Phys. 27, 869 (1986).
4. K. T. Hecht, The vector coherent state method and its applications to problems of higher
symmetry, Lecture Notes in Physics Vol. 290 (Springer, New York 1987).
5. D. J. Rowe, R. LeBlanc, and J. Repka, J. Phys. A: Math. Gen. 22, L309 (1989).