Rucklidge, J. C., C. K. Brooks, and T. F. D. Nielsen. “Petrology of the Coastal Dykes at Tugtilik, Southern East Greenland”. Meddelelser Om Grønland. Geoscience, vol. 3, Mar. 1980, p. 17 pp., doi:10.7146/moggeosci.v3i.141005.