@article {689, title = {C-13 Chemical Shielding in Oxalic-Acid, Oxalic-Acid Dihydrate, and Diammonium Oxalate}, journal = {Journal of Chemical Physics}, volume = {63}, year = {1975}, note = {J Chem PhysAk998Times Cited:49Cited References Count:20}, pages = {1267-1271}, isbn = {0021-9606}, doi = {Doi 10.1063/1.431418}, url = {://WOS:A1975AK99800034}, author = {Griffin, R. G. and Pines, A. and Pausak, S. and Waugh, J. S.} }