Nikolov, Bogdan, Slaveya Petrova, Vanya Naydenova, and Delka Karagyozova-Dilkova. 2021. “INTERACTIVE METHODS OF TRAINING IN SUSTAINABLE WASTE MANAGEMENT”. Proceedings of CBU in Natural Sciences and ICT 2 (October):81-86. https://doi.org/10.12955/pns.v2.157.