6th International BAPT Conference "Power Transmissions 2019" : Varna, Bulgaria, June 19-22, 2019
7th International BAPT Conference "Power Transmissions 2020" : Borovets, Bulgaria, June 10-13, 2020
8th International BAPT Conference "Power Transmissions 2022" : Varna, Bulgaria, September 5-8, 2022
9th International BAPT Conference "Power Transmissions 2023" : Varna, Bulgaria, September 4-7, 2023
11th European Space Power Conference : Porto Palace Thessaloniki, Greece, October 3-7, 2016
19th International Stirling Engine Conference (ISEC 2021) : Rome, Italy, September 22-23, 2021