NILSSEN, J. P.; WÆRVÅGEN, S. B. Superficial Ecosystem Similarities Vs Autecological Stripping: The "twin Species" Mesocyclops Leuckarti (Claus) and Thermocyclops Oithonoides (Sars) - Seasonal Habitat Utilisation and Life History Traits. J Limnol 2000, 59, 79-102.