@article{ Solr-acta15328, title = {On rings satisfying (x, y, z) = (y, z, x)}, series = {Acta scientiarum mathematicarum}, author = {Paul Yash}, year = {1992}, url = {http://acta.bibl.u-szeged.hu/15328/1/math_056_fasc_001_002_047-049.pdf} }