1. Assoc. Prof. Plamen Tsankov (2023) "MEASUREMENT AND ANALYSIS OF THE SPECTRAL EMISSION OF DIFFERENT TYPES OF DOMESTIC LAMPS IN THE BLUE LIGHT HAZARD WAVELENGTH RANGE" - Contemporary Materials 2023 - Savremeni materijali
(https://ekonferencije.com/sr1/rad/measurement-and-analysis-of-th/6508)

2. Assoc. Prof. Plamen Tsankov (2021) "REDUCING CLIMATE CHANGE BY INSTALLING A NEW PHOTOVOLTAIC POWER PLANT IN BULGARIA" - Contemporary Materials 2021 - Savremeni materijali
(https://ekonferencije.com/sr1/rad/reducing-climate-change-by-ins/5991)

3. Assoc. Prof. Plamen Tsankov (2019) "Technical and Economic Development of the Photovoltaic Electricity in Bulgaria" - Contemporary Materials 2019 - Savremeni Materijali
(https://ekonferencije.com/sr1/rad/technical-and-economic-develop/5723)