Kniahina , V.N. and Monakhov , V.S. 2020. Finite groups with $\Bbb P$-subnormal Sylow subgroup. Ukrains’kyi Matematychnyi Zhurnal. 72, 10 (Oct. 2020), 1365 - 1371. DOI:https://doi.org/10.37863/umzh.v72i10.2264.