@article{PismaZhETF.24.555, title = {Increase of the cross section and narrowing of the line of two-photon absorption as a result of the Dicke effect}, author = {Barantsov, V. I. and Popov, A. K.}, journal = {πΙΣΨΝΑ Χ φότζ}, volume = {24}, issue = {10}, pages = {555}, year = {1976}, doi = {}, url = {http://jetpletters.ru/ps/0/article_27772.shtml}, }