1. Adema JPHM (1990) Een nieuwe zeepok in Nederland. Zeepaard 50:13–15
2. Springer series in invasion ecology;A-L Agnalt,2010
3. Alvsvåg J, Agnalt A-L, Jørstad KE (2009) Evidence for a permanent establishment of the snow crab (Chionoecetes opilio) in the Barents Sea. Biol Invas 11:587–595
4. Anisimova N, Hjelset AM, Manushin IE, Pinchukov MA, Sundet J (2004) Joint report for 2004 on the red king crab (Paralithodes camtchaticus) investigations in the Barents Sea. Report on the 33rd Session of the Joint Russian-Norwegian Fisheries Commission, p 26
5. Asakura A (2006) The story behind the discovery of Hemigrapsus takanoi Asakura and Watanabe, 2005, a cryptic species of crab, previously thought to be the common Japanese intertidal crab H. penicillatus (Decapoda: Brachyura: Grapsoidea). Taxa 21:33–39