Serov Mykola I

Publications in Math-Net.Ru

1. Certain properties of the spectrum of a non-selfadjoint differential operator of the second order
   
   Dokl. Akad. Nauk SSSR, 131:1 (1960),  27–29
2. Remark on the number of zeros of the solution of a linear differential equation of the second order
   
   Uspekhi Mat. Nauk, 6:6(46) (1951),  182–183