Videnova, Mihaela. 2019. “IMPACT OF THE ENVIRONMENT ON DEVELOPMENT OF HELMINTH AND PROTOZOAN INVASIVE ELEMENTS AND CONTEMPORARY METHODS FOR SANITARY- PARASITOLOGICAL DIAGNOSTICS: REVIEW”. PROBLEMS of Infectious and Parasitic Diseases 47 (2):18-23. https://pipd.ncipd.org/index.php/pipd/article/view/47_2_5_IMPACT_OF_THE_ENVIRONMENT_ON_DEVELOPMENT_OF_HELMINTH_AND_.