1] mr Miodrag Marjanović SODIUM IN DRINKING WATER" - Contemporary Materials 2018 - Savremeni Materijali, 04.06.2018.
(https://ekonferencije.com/sr1/rad/sodium-in-drinking-water/5575)

2] mr Miodrag Marjanović ANALYSIS OF THE CONTENTS OF CALCIUM, MAGNESIUM AND TOTAL HARDNESS IN WATER FOR PHARMACEUTICAL PURPOSES" - Contemporary Materials 2017 - Savremeni Materijali, 14.06.2017.
(https://ekonferencije.com/sr1/rad/analysis-of-the-contents-of-ca/5143)