@article{article7a392c20,
title   = {Commuting U-operators and nondegenerate imbeddings of Jordan systems},
author = {Anquela, José A. and Cortés, Teresa and Shestakov, Ivan P},
year = {2018},
doi = {10.1007/s11856-018-1681-5},
journal   = {Israel Journal of Mathematics}
}