  
  
  [1XReferences[101X
  
  [[20XBJS+[120X]  [16XBocheński,  M.,  Jastrzębski,  P.,  Szczepkowska, A., Tralle, A. and
  Woike, A.[116X, [17XSemisimple subalgebras in simple Lie algebras and a computational
  approach   to   the   compact  Clifford-Klein  forms  problem[117X,  [18XExperimental
  Mathematics[118X, https://doi.org/10.1080/10586458.2018.1492475.
  
  [[20XDFdG14[120X]  [16XDietrich,  H., Faccin, P. and de Graaf, W. A.[116X, [17XCoReLG, computation
  with  real  Lie  groups,  Version  1.20[117X  (2014),  ((Refereed  GAP package)),
  http://users.monash.edu/~heikod/corelg/.
  
  [[20XDFdG15[120X]  [16XDietrich,  H., Faccin, P. and de Graaf, W. A.[116X, [17XRegular subalgebras
  and  nilpotent  orbits  of real graded Lie algebras[117X, [18XJournal of Algebra[118X, 423
  (2015), 1044–1079.
  
  [[20XdG[120X]  [16Xde  Graaf,  W.  A.[116X,  [17XSLA,  Computing with Simple Lie Algebras, Version
  1.5.2[117X, ((Refereed GAP package)), https://gap-packages.github.io/sla/.
  
  [[20XOV90[120X]  [16XOnishchik,  A.  and  Vinberg,  E.[116X,  [17XLie Groups and Algebraic Groups[117X,
  Springer-Verlag  Berlin Heidelberg, first edition, Springer Series in Soviet
  Mathematics  (1990),  ((Original  Russian edition published by Nauka, Moscow
  1988)).
  
  
  
  [32X
