Emil has been also involved in the following long-term projects: 1) Monitoring programme of present-day small mountain glaciers in the Balkan Peninsula (in cooperation with Serbian and Slovenian colleagues). 2) Exploring permafrost occurrence in the Rila and Pirin Mountains (Bulgaria) (in cooperation with Romanian colleagues): https://www.researchgate.net/project/Exploring-permafrost-occurrence-in-the-Rila-and-Pirin-Mountains-Bulgaria