1] Željana Lojpur EXAMINATION OF THE POSSIBILITY OF OBTAINING BIODIESEL FROM SUNFLOWER OIL AND VARIOUS WASTE EDIBLE OILS" - Contemporary Materials 2024 - Savremeni Materijali, 01.07.2024.
(https://ekonferencije.com/sr1/rad/examination-of-the-possibility/6599)

2] Željana Lojpur EXAMINATION OF THE POSSIBILITY OF OBTAINING BIODIESEL FROM UNREFINED SUNFLOWER OIL" - Contemporary Materials 2024 - Savremeni Materijali, 01.07.2024.
(https://ekonferencije.com/sr1/rad/examination-of-the-possibility/6596)