@article{MOMA_1993__115_4_178602,
     author = {Ming-Chit Liu and Man-Cheung Leung},
     title = {On {Generalized} {Quadratic} {Equations} in {Three} {Prime} {Variables.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {133--168},
     publisher = {mathdoc},
     volume = {115},
     number = {4},
     year = {1993},
     zbl = {0779.11045},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1993__115_4_178602/}
}