Babkin B N

Publications in Math-Net.Ru

1. The theorem of S. A. Chaplygin on differential inequalities
   
   Mat. Sb. (N.S.), 46(88):4 (1958),  389–398
2. Approximate integration of systems of ordinary differential equations of the first order by the method of S. A. Chaplygin
   
   Izv. Akad. Nauk SSSR Ser. Mat., 18:5 (1954),  477–484