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@article{MZ_1983__183_173341, author = {Arnold Neumaier}, title = {On {Norm} {Three} {Vectors} in {Integral} {Euclidean} {Lattices.} {I.}}, journal = {Mathematische Zeitschrift}, pages = {565--574}, publisher = {mathdoc}, volume = {183}, year = {1983}, zbl = {0496.10018}, url = {http://geodesic.mathdoc.fr/item/MZ_1983__183_173341/} }
Arnold Neumaier. On Norm Three Vectors in Integral Euclidean Lattices. I.. Mathematische Zeitschrift, Tome 183 (1983), pp. 565-574. http://geodesic.mathdoc.fr/item/MZ_1983__183_173341/