Trond Taugbøl & Stein I. Johnsen.„Invasive Alien Species Fact Sheet – Pacifastacus leniusculus“ (PDF). Online Database of the North European and Baltic Network on Invasive Alien Species. NOBANIS – European Network on Invasive Species (2006). 2012-yil 29-avgustda asl nusxadan arxivlangan. Qaraldi: 2010-yil 28-avgust.
Trond Taugbøl & Stein I. Johnsen.„Invasive Alien Species Fact Sheet – Pacifastacus leniusculus“ (PDF). Online Database of the North European and Baltic Network on Invasive Alien Species. NOBANIS – European Network on Invasive Species (2006). 2012-yil 29-avgustda asl nusxadan arxivlangan. Qaraldi: 2010-yil 28-avgust.