Boole E., Buraks I., Vershinin A., Spunde R. Extension of event timer A033-ET family “20th International Workshop on Laser Ranging October 9-14, 2016, Potsdam ”Poster and Absctract in NASA database: https://cddis.nasa.gov/lw20/docs/2016/abstracts/P10-Buraks_abstract.pdf
