@article{ADM_2009_3_a8,
     author = {V. S. Rodrigues and A. A. Santana},
     title = {A note on a~problem due to {Zelmanowitz}},
     journal = {Algebra and discrete mathematics},
     pages = {85--93},
     publisher = {mathdoc},
     number = {3},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2009_3_a8/}
}