PACS:87.15.Mi, 42.50.Md, 87.15.Nn, 82.50.−m (all) DOI:10.1070/PU1988v031n03ABEH005718 URL: https://ufn.ru/en/articles/1988/3/c/ Citation: Avarmaa R A, Rebane K K "Zero-phonon lines in the spectra of chlorophyll-type molecules embedded in low-temperature solid-state matrices" Sov. Phys. Usp.31 225–240 (1988)