Ishchenko Anna Sergeevna

Publications in Math-Net.Ru

1. On solvability of certain classes of irregular the second order variation problems
   
   Izv. Saratov Univ. Math. Mech. Inform., 7:2 (2007),  32–36
2. An Irregular Extension of the Oscillation Theory of the Sturm–Liouville Spectral Problem
   
   Mat. Zametki, 82:4 (2007),  578–582