1. et Principles of Organic Mass Spectrometry, McGraw-Hill, London 1972, p. 18.
2. et en préparation.
3. (a) et Bull. Soc. Chim. France 1324 (1963).
4. On steroids. LXXVIII. Mass spectra of Holarrhena alkaloids
5. (c) et Structure Elucidation of Natural Products by Mass Spectrometry, Holden Day, San Francisco, 1964, p. 5.