@misc{indiciaea98e10a09568, title = {Generalized spin systems and sigma models.}, author = {S Randjbar-Daemi and A Salam and J Strathdee}, year = {1993}, doi = {10.1103/physrevb.48.3190}, url = {https://pubmed.ncbi.nlm.nih.gov/10008743/}, note = {Source identifier: 10008743} }