T. YAMASAKI, T. HIKIDA, J. NABHITABHATA, S. PANHA, and H. OTA, “Geographic Variations in the Common Skink Sphenomorphus maculatus (Blyth, 1853) in Thailand, with Re-validation of Lygosoma mitanense Annandale, 1905 as Its Subspecies”, Trop. Nat. His., vol. 1, no. 1, pp. 23–31, Aug. 2001.