@article{article,
title = {Investigations on 4-hydroxy-coumarin derivatives. III. The condensation products of the nitro derivatives of some aromatic aldehydes with 4-hydroxycoumarin},
author = {},
year = {1959},
journal = {Dissertationes Pharm},
volume = {11},
number = {3},
pages = {243-249},
howpublished = "\url{https://eurekamag.com/research/024/899/024899917.php}"
}