http://www.juliusz.pernak.com.pl/studies-of-activity-of-some-new-quaternary-ammonium-salts-against-some-selected-bacteria-and-fungi-iii-susceptibility-of-some-microbial-strains-isolated-from-clinical-material-to-ammonium-bases/ Juliusz Pernak Ionic Liquids - Poland hourly 1 https://wordpress.org/?v=3.8.41