Bergström, J., and J. R. Ineson. “The Arthropod Trail Multipodichnus from the Upper Middle Cambrian (Holm Dal Formation) of Central North Greenland”. Meddelelser Om Grønland. Geoscience, vol. 20, Dec. 1988, pp. 113–117, doi:10.7146/moggeosci.v20i.139891.