	Authors	Year	Title
	Leonova, Leman & Shi	1999	Discovery of an Early Permian (Late Sakmarian) ammonoid from Langkawi Island, Malaysia. Alcheringa, 23: 277-281.
	Sone & Leman	2000	Some Mid-Permian Fossils from Felda Mayam, Central Peninsular Malaysia. Proceedings of Annual Geological Conference 2000, Penang (eds. G.H.Teh, J.J.Pereira & T.F.Ng, 143-149, 6 fig., 1 tab., Kuala Lumpur.
	Sone, Leman & Ehiro	2001	Middle Permian cephalopods from central Peninsular Malaysia:implications for faunal migration through the southern Tethys. Journal of Asian Earth Sciences, 19: 805-814, 11fig.