Jursenas, S., Gruodis, A., Kodis, G., Kovalevskij, V. and Valkunas, L., Excitons in polar molecular compounds., Symposium on Electronic Processes in Organic Condensed Matter, In honor of the 80th birthday of Professor Martin Pope, NSF Center for photoinduced Charge Transfer University of Rochester, Rochester, NY, USA, August 1, 1998, p. 20. 1998