@article{702388,
     title = {Numerical calculations for some types of boundary value problems with unbounded domains},
     booktitle = {Equadiff 7},
     series = {GDML\_Books},
     publisher = {BSB B.G. Teubner Verlagsgesellschaft},
     address = {Leipzig},
     year = {1990},
     pages = {236-239},
     zbl = {0709.65083},
     url = {http://dml.mathdoc.fr/item/702388}
}

Collatz, L. Numerical calculations for some types of boundary value problems with unbounded domains, dans Equadiff 7, GDML_Books,  (1990), pp. 236-239. http://gdmltest.u-ga.fr/item/702388/