@article{GDZPPN002356392,
title = {A singular Sturm-Liouville problem treated by non-standard analysis.},
journal = {Mathematica Scandinavica},
volume = {47},
year = {1980},
pages = {275-294},
zbl = {0438.34019},
url = {http://dml.mathdoc.fr/item/GDZPPN002356392}
}
Birkeland, Bent. A singular Sturm-Liouville problem treated by non-standard analysis.. Mathematica Scandinavica, Tome 47 (1980) pp. 275-294. http://gdmltest.u-ga.fr/item/GDZPPN002356392/