Literature
  • Picton 1993
  • A field guide to the shallow-water Echinoderms of the British Isles. Immel Publishing Limited.
  • Picton, Morrow 1994
  • A field guide to the Nudibranches of the British Isles. Immel Publishing Limited.
  • Platvoet 1995
  • Description of a new Caprella-species from the Netherlands: Caprella macho nov. spec. (Crustacea, Amphipoda, Caprellidea). Bull. zool. Mus. Univ. Amsterdam, 15(1): 1-4.
  • Polderman, 1975
  • De zeegrassen in de Waddenzee. Wet. Meded. KNNV, 107.
  • Pouwer 1987
  • Schelpen van Ensis directus in de Oosterschelde. Het Zeepaard, 47(4): 106.