@misc{Gąsiorowski_Michał_Natural,
 author={Gąsiorowski, Michał and Stankiewicz, Elwira},
 howpublished={online},
 title={Natural and anthropogenic transformations of Wielki Staw Lake in Karkonosze Mountains during the last 200 years reflected by changes of diatomic and cladoceran assemblages.},
}