Andonova, Velichka, Plamen Zagorchev, Plamen Katsarov, and Margarita Kassarova. 2015. “EYE DROPSWITH NANOPARTICLES AS DRUG DELIVERY SYSTEMS”. International Journal of Pharmacy and Pharmaceutical Sciences 7 (2):431-35. https://journals.innovareacademics.in/index.php/ijpps/article/view/4149.