@article{EXMA_1994__3_3_226267,
     author = {Lewis, Robert H. and Liriano, Sal},
     title = {Isomorphism classes and derived series of certain almost-free groups.},
     journal = {Experimental mathematics},
     pages = {255--258},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {1994},
     zbl = {0837.20044},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMA_1994__3_3_226267/}
}