@article{MM2_1995__87_4_156097,
     author = {Friedrich Tomi and Jaime Ripoll},
     title = {Maximum {Principles} for {Minimal} surfaces in {R3} {Having} noncompact boundary and a uniqueness theorem for the helicoid.},
     journal = {Manuscripta mathematica},
     pages = {417--434},
     publisher = {mathdoc},
     volume = {87},
     number = {4},
     year = {1995},
     zbl = {0838.53014},
     url = {http://geodesic.mathdoc.fr/item/MM2_1995__87_4_156097/}
}