@article{DOCMA_2014__19__a37,
     author = {Murata, Manabu},
     title = {On quadratic {Diophantine} equations in four variables and orders associated with lattices},
     journal = {Documenta mathematica},
     pages = {247--284},
     publisher = {mathdoc},
     volume = {19},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2014__19__a37/}
}