Berenstein, Arkady Max Planck Institute for Mathematics, Max Planck Society;
Retakh, Vladimir Max Planck Institute for Mathematics, Max Planck Society;
Berenstein, A., & Retakh, V. (2008). Lie algebras and Lie groups over noncommutative rings. Advances in Mathematics, 218(6), 1723-1758. doi:10.1016/j.aim.2008.03.003.