Kharlamov's inequalities and Petrovskii–Oleinik inequalities
V. I. Zvonilov

References
1.	Petrovskii I.G., Oleinik O.A., Izv. AN SSSR, seriya matem., 13 (1949), 389–402
2.	Kharlamov V.M., Funkts. analiz, 8:2 (1974), 50–56
3.	Hirzebruch F., Proc. Intern. Congress Math. (1954), v. III, North Holland Publishing Co., 1956, 457–473