Anon. n.d. ‘The Surtsey Research Society’. Retrieved (https://english.surtsey.is/).
Cain, Michael L., William D. Bowman, and Sally D. Hacker. 2014. Ecology. Third edition. Sunderland, Massachusetts, U.S.A.: Sinauer Associates.
Jones, A. M., Robert Reed, and Jonathan D. B. Weyers. 2012. Practical Skills in Biology. 5th ed. Harlow: Pearson.
Kay, Ian and NetLibrary, Inc. 1998. Introduction to Animal Physiology. Oxford: BIOS Scientific Publ.
Morris, Professor James R., Harvard University Daniel L. Hartl, Professor Andrew H. Knoll, and Professor Robert A. Lue. 2015. Biology: How Life Works. 2 ed. W. H. Freeman.