@article{Lavryk _1998 author = {V. I. Lavryk and A. N. Bilyk and N. A. Nikiforovich}, title = {Determining the Optimal Water-Salt Regime of Lakes Yalpug and Kugurlui by Means of Mathematical Modeling}, journal = {Hydrobiological Journal}, issn = {0018-8166}, year = {1998}, volume = {34}, number = {6}, pages = {28--35} }