1. : The Chemistry of Heterocyclic Compounds, Vol. 41, The Pyrazines, Wiley, Chichester 1982;
2. Recent Advances in Pyazine Chemistry
3. : The HMO-Model and its Application, Vol. 1, Wiley, New York 1976, (a) p. 191 and 233, (b) p. 180, (c) p. 308.
4. : Molecular Orbital Theory for Organic Chemists, Wiley, New York 1961.
5. Configuration Interaction Studies of Ground and Excited States of Polyatomic Molecules II. The Electronic States and Spectrum of Pyrazine