@article{10_4064_aa112_4_6,
     author = {H. G. Grundman and L. L. Hall},
     title = {New solutions to $xyz = x+y+z = 1$
 in integers of quartic fields},
     journal = {Acta Arithmetica},
     pages = {405--409},
     publisher = {mathdoc},
     volume = {112},
     number = {4},
     year = {2004},
     doi = {10.4064/aa112-4-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa112-4-6/}
}