Bissera Pilicheva, Plamen Zagorchev, Yordanka Uzunova, and Margarita Kassarova. 2013. “Development and in Vitro Evaluation of Mucoadhesive Microsphere Carriers for Intranasal Delivery of Betahistine Dihydrochloride”. International Journal of Drug Delivery 5 (4):389-401. https://ijdd.arjournals.org/index.php/ijdd/article/view/217.