@article{JLT_1993_3_1_a4,
     author = {K. H. Hofmann and J. D. Lawson and W. A. F. Ruppert},
     title = {On {Finiteness} {Theorems} and {Porcupine} {Varieties} in {Lie} {Algebras}},
     journal = {Journal of Lie theory},
     pages = {049--064},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {1993},
     url = {http://geodesic.mathdoc.fr/item/JLT_1993_3_1_a4/}
}