1] mr Ljubica Bojanić A COMPARATIVE ANALYSIS OF THE CONTENTS OF CALCIUM, MAGNESIUM AND TOTAL HARDNESS INPURIFIED WATER AND WATER FOR INJECTION" - Contemporary Materials 2019 - Savremeni Materijali, 15.07.2019.
(https://ekonferencije.com/sr1/rad/a-comparative-analysis-of-the-/5738)

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

3] mr Ljubica Bojanić 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)