@article{NUMA_1982__39_132797,
     author = {E. Zehnder and D. Braess},
     title = {On the {Numerical} {Treatment} of a {Small} {Divisor} {Problem.}},
     journal = {Numerische Mathematik},
     pages = {269--292},
     publisher = {mathdoc},
     volume = {39},
     year = {1982},
     zbl = {0497.65047},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1982__39_132797/}
}