@article{PismaZhETF.7.348, title = {Narrowing of the Doppler Width in a Standing Wave}, author = {Letokhov, V. S.}, journal = {πΙΣΨΝΑ Χ φότζ}, volume = {7}, issue = {9}, pages = {348}, year = {1968}, doi = {}, url = {http://jetpletters.ru/ps/0/article_25663.shtml}, }