	Authors	Year	Title
	Gupta & Erben	1983	A Late Devonian ammonoid faunula from Himachal Pradesh, India. Paläontologische Zeitschrift, 57 (1/2): 93-102, fig.1-6; Stuttgart.
	Waterhouse & Gupta	1985	Cyclolobus and Otoceras from Spiti, Northwest India. Contributions to Himalayan Geology, 3, Geology of Western Himalayas, 219-224, 1 text-fig., 1 pl.