1. Electronic States of Organic Molecular Crystals, Izd. Zinatne, Riga 1978 (in Russian).
2. and , in: Excited States, Vol. 1, Ed. Academic Press, New York 1974 (p. 79).
3. Dipole–Dipole Interaction of Substitutional Impurity Molecules in Crystals
4. Theory of Excitons, Izd. Nauka, Moscow 1968 (in Russian).