Buffer gas-assisted four-wave mixing resonances in alkali vapor excited by a single cw laser Svetlana Shmavonyan, Aleksandr Khanbekyan, Alen Khanbekyan, Emilio Mariotti and Aram V. Papoyan Eur. Phys. J. D, 70 12 (2016) 258 Published online: 06 December 2016 DOI: 10.1140/epjd/e2016-70212-8