A system of four ODEs: the singularity analysis
  The singularity analysis is carried out for a system of four first-order quadratic ODEs with a parameter, which was proposed recently by Golubchik and Sokolov. A transformation of dependent variables is revealed by the analysis, after which the transformed system possesses the Painlev\'{e} property and does not contain the parameter. 
Sergei Yu. Sakovich