@article{MM2_1997__93_4_156304,
     author = {Mihai Cipu},
     title = {Diophantine {Equations} with at most one positive solution.},
     journal = {Manuscripta mathematica},
     pages = {349--356},
     publisher = {mathdoc},
     volume = {93},
     number = {4},
     year = {1997},
     zbl = {0877.11013},
     url = {http://geodesic.mathdoc.fr/item/MM2_1997__93_4_156304/}
}