Pirogov, Yu F On the photon fragmentation into the neutral vector mesons / О фрагментации фотона в нейтральные векторные мезоны Yu F Pirogov, N L Ter-Isaakyan. - Yerevan : Yerevan Physics Institute, 1974. - 10 pages ; 20 cm. - 539.172 (NLA) . Subjects--Topical Terms: Photon-photon interactionsPhotons Universal Decimal Class. No.: 539.172 (NLA)