1. in (Ed.) Heterocyclic Chemistry, Vol. 1, Wiley, New York, 1950, pp. 61 to 77.
2. in (Ed.) Methoden der Organischen Chemie (Houben-Weyl), Vol. XI, part 2, Georg Thieme Verlag, Stuttgart, 1958, pp. 223 to 265.
3. in (Ed.) Heterocyclic Compounds with Three- and Four-Membered Rings, Part I, Interscience, New York, 1964, pp. 524 to 575.
4. American Petroleum Institute, Research Project 44, Catalogue of Mass Spectral Data, Carnegie Institute of Technology, Pittsburgh, Pa: (a) Spectrum 763;
5. Catalogue of Mass Spectral Data, Carnegie Institute of Technology, Pittsburgh, Pa: (b) Spectrum 1141;