2 citations to https://www.mathnet.ru/rus/sm4504
  1. Mykytyuk I.V., “Structure of the coadjoint orbits of Lie algebras”, J. Lie Theory, 22:1 (2012), 251–268  mathscinet  zmath  isi  elib
  2. Bavo Langerock, Tom Mestdag, Joris Vankerschaver, “Routh Reduction by Stages”, SIGMA, 7 (2011), 109, 31 pp.  mathnet  crossref