Jason A. Dunlop, David Penney, O. Erik Tetlie, Lyall I. Anderson: How many species of fossil arachnids are there. The J. of Arachnology, (2008)., 2008, nro 36(2), s. 267-272. https://doi.org/10.1636/CH07-89.1+Artikkelin verkkoversio. Viitattu 11.3.2019.
cell.com
Shawn J Stachel, Scott A Stockwell, David L Van Vranken: The fluorescence of scorpions and cataractogenesis. Cell Chemical Biology, 1999. Artikkelin verkkoversio. Viitattu 11.3.2019.
doi.org
Jason A. Dunlop, David Penney, O. Erik Tetlie, Lyall I. Anderson: How many species of fossil arachnids are there. The J. of Arachnology, (2008)., 2008, nro 36(2), s. 267-272. https://doi.org/10.1636/CH07-89.1+Artikkelin verkkoversio. Viitattu 11.3.2019.