Hi Oscar,
I am not entirely familiar with V.t.o.'s, but I do have informations on them. Have you looked at Daniel Bennett's book? Matt Vincent's book? Ok, here is what I have on them:
Butler, M.D. 1998. Freckled Monitor Case. Dragon News 2(1):7-8.
Bennett, D. 1993. A note on newly hatched Varanus tristis tristis in Great Victoria Desert. Brit. Herp. Soc. Bull. 44:35-37.
Eidenmuller, B. 1989. Beobachtungen bei der haltung und nachzucht von Varanus tristis orientalis. Salamandra 25:265-271.
Houston, T.F. 1973. Reptiles of South Asutralia. South Australian Yearbook. 11p.
Korner, M. 1999. Die erfolgreiche nachzucht des Australianischen trauerwarans. Monitor (DGHT) 8(2):5-11.
Murphy, J. 1972. Notes on Indo-Australian varanids in captivity.
Int'l. Zoo Yearbook 12:199-202.
O'Dell, J. 1992. Successful captive propagation of the freckled monitor. VaraNews 3(2):4-6 [see also Reptiles 1996, 4(7):32-34, 36, 37-38.
Trevor, C. 1981. Varanus tristis - a variable monitor. Herpetofauna 12(2):7-12.
Zwininberg, A.J. 1971. Australische reptilien VI. Lacerta 29(12):119-127.
cheers Oscar,
mbayless