Finite groups in which every 3-Maximal subgroup commutes with all maximal subgroups

Finite groups with all 3-maximal subgroups K-U-subnormal

“…Li [17] obtained a classification of nonnilpotent groups whose all 2-maximal subgroups are T I-subgroups. In [18], W. Guo, H.V. Legchekova and A.N.…”