Esipov V.M. (1986). The status and perspective protection and rehabilitation of natural ecosystems in the Chatkal state biosphere nature reserve under the State Committee for Agriculture and Industry of the USSR.
Abstract: The area of the Chatkal nature reserve reduced as part of its territory (a land plot in the Shavasay river basin) was assigned to a military game preserve. As regime of protection worsened, number of animals such as Menzbier's marmot, snow leopard, ibex, snow cock, and black stork began to reduce.