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Prof. Oleg Bazaluk, Prof. Sergiy Rudenko, Prof. Denys Svyrydenko, Dr. Zhang Changming. Guangdong University of Petrochemical Technology, Maoming, China, April 11, 2019.

Dr. Li Dehao, Prof. Oleg Bazaluk, Dr. Weizhen Gao, Prof. Sergiy Rudenko, Prof. Denys Svyrydenko, Guangdong University of Petrochemical Technology, Maoming, China, April 16, 2019

Dr. Weizhen Gao, Prof. Sergiy Rudenko, Prof. Oleg Bazaluk, Prof. Denys Svyrydenko, Guangdong University of Petrochemical Technology, Maoming, China, April 16, 2019