Ėksperimentalʹnye gidrologicheskie issledovani︠i︡a na Valdae - Volʹf︠t︡sun, I. B. (Iosif Borukhovich); Uryvaev, A. P. (Trudy Gosudarstvennogo ordena Trudovogo Krasnogo Znameni gidrologicheskogo instituta, 1979)