FOSTER, Garth N. - FRIDAY, Laurie - HÁJEK, Jiří. Keys to adults of the water beetles of Britain and Ireland. (Part 1, Coleoptera: Hydradephaga: Gyrinidae, Haliplidae, Paelobiidae, Noteridae and Dytiscidae). 2nd ed. St. Albans : Royal Entomological Society ; Telford : Field Studies Council, c2011. iv, 144 s. Handbooks for the identification of British insects ; Vol. 4, Pt. 5. ISBN 978-0-901546-93-7.