1. Burnside W., “On groups of order p
a
q
b (second paper),” Proc. London Math. Soc., vol. 2, no. 2, 432–437 (1985).
2. Monakhov V. S., “Invariant subgroups of biprimary subgroups,” Math. Notes, vol. 18, no. 6, 1109–1114 (1975).
3. Passman D. S., “Groups with normal solvable Hall p-subgroups,” Trans. Amer. Math. Soc., vol. 123, no. 1, 99–111 (1966).
4. Zenkov V. I., “The intersections of nilpotent subgroups in finite groups,” Fund. Prikl. Mat., vol. 2, no. 1, 1–92 (1996).
5. Zenkov V. I. and Mazurov V. D., “The intersection of Sylow subgroups in finite groups,” Algebra and Logic, vol. 35, no. 4, 236–240 (1996).