@article{MZ_1976__151_172450,
     author = {M.E. Adams and J. Sichler},
     title = {V-Free {Products} of {Hopfian} {Lattices.}},
     journal = {Mathematische Zeitschrift},
     pages = {259--262},
     publisher = {mathdoc},
     volume = {151},
     year = {1976},
     zbl = {0325.06001},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__151_172450/}
}