no. 1
On Engel-like congruences
Compositio Mathematica, Tome 29 (1974) no. 1, pp. 67-73 
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     author = {Weichsel, Paul M.},
     title = {On {Engel-like} congruences},
     journal = {Compositio Mathematica},
     pages = {67--73},
     year = {1974},
     publisher = {Noordhoff International Publishing},
     volume = {29},
     number = {1},
     mrnumber = {357610},
     zbl = {0295.20045},
     language = {en},
     url = {https://www.numdam.org/item/CM_1974__29_1_67_0/}
}
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Weichsel, Paul M. On Engel-like congruences. Compositio Mathematica, Tome 29 (1974) no. 1, pp. 67-73. https://www.numdam.org/item/CM_1974__29_1_67_0/

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[2] D.J.S. Robinson: Finiteness Conditions and Generalized Soluble Groups, Part 2. Springer, Berlin, Heidelberg, New York 1972. | Zbl | MR

[3] W.R. Scott: Group Theory. Prentice-Hall, Engelwood Cliffs, N. J. (1964). | Zbl | MR