Application of bioanalytical HPLC method for determination of betamethasone dipropionate in GCF for evaluatio of local periodontal tretment - Bogdanovska L, Popovska M, Atanasovska Stojanovska A, Nakov N, Dimitrovska A, Petkova R. (8th World meeting on biopharmaceutics and pharmaceutical tecnology,2011, 2011)