Optical absorption band of bipolarons in LiNbO3 Mironov, S. P. ; Golenishchev-Kutuzov, V. A. ; Akhmadullin, I. Sh. ; Migachev, S. A. Abstract Publication: Physics of the Solid State Pub Date: October 1995 Bibcode: 1995PhSS...37.1750M