Darvill, Thimoty (1987). Prehistoric Britain. Routldge word archaeology. p. 56. (requiere registro).
books.google.com
Burdukiewicz, Jan Michał (1986) The late Pleistocene shouldered point assemblages in western Europe (originally published in Polish in 1982) E.J. Brill, Leiden, The Nederlands, page 108, ISBN 978-90-04-08100-0
