@article{1178229633,
author = {Fink, A. M.},
title = {Pointwise inequalities and continuation of solutions of an $n$th order equation},
journal = {Tohoku Math. J. (2)},
volume = {32},
number = {4},
year = {1980},
pages = { 169-175},
language = {en},
url = {http://dml.mathdoc.fr/item/1178229633}
}
Fink, A. M. Pointwise inequalities and continuation of solutions of an $n$th order equation. Tohoku Math. J. (2), Tome 32 (1980) no. 4, pp. 169-175. http://gdmltest.u-ga.fr/item/1178229633/