1. Zoller, U. 1983.Small Ring Heterocycles, Edited by: Hassner, A. 333–449. New York: Wiley.
2. Zoller, U. 1996.Comprehensive Heterocyclic Chemistry, 2nd ed., Edited by: Padwa, A. 37Oxford, U. K.: Elsevier Science. Chap. 1.
3. Strained Organic Compounds: Introduction
4. Substituted Oxirenes (X2C2O, X = BH2, CH3, NH2, OH, F): Can They Be Made?