Davies, H.L., T.F. Robinson, B.L. Roeder, M.E. Sharp, N.P. Johnston and A.C. Christensen.  "Digestibility, nitrogen balance, and blood metabolites in llama (Lama glama) and alpaca (Lama pacos) fed barley or barley alfalfa diets."  Small Rum. Res.  73 (2007): 1-7.  <website>

Davies, H.L., T.F. Robinson, B.L. Roeder, M.E. Sharp, N.P. Johnston and A.C. Christensen.  "Plasma metabolites and nitrogen balance in Lama glama associated with forage quality at altitude."  Small Rum. Res.  69 (2007): 1-9.  <website>

Sponheimer, M., T.F. Robinson, T.E. Cerling, L. Tegland, B.L. Roeder, L. Ayliffe, M.D. Dearing and J.R. Ehleringer.  "Turnover of stable carbon isotopes in the muscle, liver, and breath CO2 of alpacas (Lama pacos)."  Rapid Commun. Mass Spectrom.  20 (2006): 1395-1399. 

Robinson, T.F., M. Sponheimer, B.L. Roeder, B. Passey, T.E. Cerling, M.D. Dearing and J.R. Ehleringer.  "Digestibility and nitrogen retention in llamas and goats fed C3 grass, and C4 grass hays."  Small Rum. Res.  64 (2006): 162-168. 

Passey, B.H., T.F. ROBINSON, L.K. Ayliffe, T.E. Cerling, M. Sponheimer, M.D. Dearing, B.L. Roeder, and J.R. Ehleringer.  "Carbon isotopic fractionation between diet, breath, and bioapatite in different mammals."  J. Arch. Sci.  32 (2005): 1459-1470. 

ROBINSON, T.F., J.D. Hammer, B.L. Roeder, S. Burton, M. Christensen, and B. Schaajle.  "Nitrogen balance and blood metabolites of alpaca (Lama pacos) fed three forages of different protein content."  Small Rum. Res.  58 (2005): 123-133. 

Codron, D., J Codron, M. Sponheimer, J.A. Lee-Thorp, T. ROBINSON, C.C. Grant, and D. DeRuiter.  "Assessing diet in Savanna herbivores using stable carbon isotope ratios of faeces."  Koedoe.  48 (2005): 115-124. 

Passey, B.H., T.E. Cerling, G.T. Schuster, T.F. ROBINSON, B.L. Roeder. and S.K. Krueger.  "Inverse methods for estimating primary input signals from time-averaged intra-tooth isotope profiles."  Geochimica et Cosmochimica Act.  69 (2005): 4101-4116. 

Ayllife, L.K., T.E. Cerling, T. Robinson, A. West, M. Sponheimer, B. Passey, J. Hammer, B. Roeder, D. Dearing, and J. Ehleringer.  "Turnover of carbon isotopes in tail hair and breath CO2 of horses fed an isotopically varied diet."  Oecologia.  139 (2004): 11-22. 

West, A.G., L.K. Ayliffe, T.E. Cerling, T.F. Robinson, B. Karren, M.D. Dearing, and J.R. Ehlringer.  "Short-term diet changes revealed using stable carbon isotopes in horse tail-hair."  Functional Ecology.  18 (2004): 616-624. 

Ayllife, L.K., T.E. Cerling, T. Robinson, A. West, M. Sponheimer, B. Passey, J. Hammer, B. Roeder, D. Dearing, and J. Ehleringer.  "Turnover of carbon isotopes in tail hair and breath CO2 of horses fed an isotopically varied diet."  Oecologia.  139 (2004): 11-22. 

West, A.G., L.K. Ayliffe, T.E. Cerling, T.F. Robinson, B. Karren, M.D. Dearing, and J.R. Ehlringer.  "Short-term diet changes revealed using stable carbon isotopes in horse tail-hair."  Func. Ecol.  18 (2004): 616-624. 

Anderson, J.A., A. Peterson, T.F. Robinson, and B.L. Roeder.  "Affect of water deprivation on plasma and urine analytes of llamas."  J. Anim. Sci.  82 (2004): 187. 

Cox, A., T.F. Robinson, F.M. Steele, and T.M. Angelos.  "Comparative study of feed regimens on tenderness of alpaca (Lama pacos) meat."  Inst. Food Technol. Mtg.  July 2004. 

Sharp, M.E., C. Horey, T.F. Robinson, and B.L. Roeder.  "Serum and urine indice comparisons between llamas and alpacas fed three forages."  J. Anim. Sci.  82 (2004): 187. 

Burton, S., T.F. Robinson, B.L. Roeder, N.P. Johnston, E. Latorre V., S Reyes B. and B. Schaajle.  "Body condition and blood metabolite characteristics of alpaca (Lama pacos) dams three months prepartum and dams and crias three months postpartum."  Sm Rum Res.  48 (2003): 69-76. 

Sponheimer, M., J. Lee-Thorp, D. DeRuiter, J. Smith, N. van der Merwe, K. Reed, L. Ayliffe, T. Robinson, C. Heidelberger and W. Marcus.  "Dietary Preferences of Southern African Bovidae: The Stable Isotope Evidence."  J. Mammalogy.  84 (2003): 471-479. 

Sponheimer, M., T. Robinson, B. Roeder, L. Ayliffe, B. Passey, T. Cerling, D. Dearing, and J. Ehleringer.  "An Experimental Study of Nitrogen Flux in Llamas: Is 14N Preferentially Excreted?."  J. Archeol. Sci.  30 (2003): 1649-1655. 

Richards, M.P., B.T. Fuller, M. Sponheimer, T. Robinson, and L. Ayliffe.  "Sulphur isotope measurements in archaeological samples: some methodological considerations."  Int. J. Osteoarchaeol.  13 (2003): 37-45.