Jursėnas, S., Gulbinas, V., Gruodis, A., Kodis, G., Kovalevskij, V. and Valkunas, L., Spectoscopy of self-trapped charge-transfer excitons in polar films and crystals of N,N-dimethylaminobenzylidene 1,3-indandione (DMABI)., Phys. Chem. Chem. Phys., 1:1715-1718 1999