@article{articled8cd4a84,
title   = {Exact s- matrices for anomaly-free non-linear sigma models on symmetric spaces},
author = {Abdalla, E. and Abdalla, M C B and Forger, Frank Michael},
year = {1988},
doi = {10.1016/0550-3213(88)90025-9},
journal   = {Nuclear Physics B}
}