Designing a beam expander for dual-wave laser fluorescence lidar / G. P. Kochanenko, M. M. Makogon, Y. N. Ponomarev [et.al.] // Journal of optical technology. 2012. Vol. 79, Issue 4. P. 217-219. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000431631