1. Pelletier, S. W.; Mody, N. V.; Joshi, B. S.; Schramm L. C. InTheAlkaloids: Chemical and Perspectives; Pelletier, S. W., Ed.; Wiley: New York, 1983; Vol. 1, pp 153−210.
2. Institute of Botany, Chinese Academy of Science and Institute of Materia Medica, Chinese Academy of Medical Science. InFlora ReipublicaePopularis Sinicae; Science Press: Beijing, 1979; Vol. 27, pp 235−236.
3. Pelletier, S. W.; Mody, N. V.; Joshi, B. S.; Schramm L. C. InTheAlkaloids: Chemical and Perspectives; Pelletier, S. W., Ed.; Wiley: New York, 1984; Vol. 2, pp 206−264.