VIGRAN , J. O.; MØRK , A.; FORSBERG , A. W.; WEISS , H. M.; WEITSCHAT , W. Tasmanites algae—contributors to the Middle Triassic hydrocarbon source rocks of Svalbard and the Barents Shelf. Polar Research, v. 27, n. 3, p. 360-371, 1 Dec. 2008.