@article{SM_1995_186_8_a3,
     author = {S. A. Kirillov},
     title = {The nilpotency class of the~sandwich subalgebra of simple finite-dimensional {Lie} algebras},
     journal = {Sbornik. Mathematics},
     pages = {1173--1184},
     year = {1995},
     volume = {186},
     number = {8},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_186_8_a3/}
}