3Gulati R D, Van Donk E. Lakes in the Netherlands, their origin, eutrophication and restoration: state of the art review[J], Hydrobiologia, 2002, 478 : 73-106.
4Drenner R W, Hambright K D. Piscivores, trophic cascades and Sake management[J]. Scientific World, 2002(2) : 284-307.