@article{NUMA_1967__10_131786,
     author = {E. BOHL},
     title = {Nichtlineare {Aufgaben} in halbgeordneten {R\"aumen.}},
     journal = {Numerische Mathematik},
     pages = {220--231},
     year = {1967},
     volume = {10},
     zbl = {0161.35301},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1967__10_131786/}
}