Dobril Valchev
- Quality of Harvested Rainwater from a Green and a Bitumen Roof in an Air Polluted Region. Dans: Civil Engineering Journal, v. 10, n. 5 (1 mai 2024). (2024):
- (2020): Towards Energy Efficient Onsite Wastewater Treatment. Dans: Civil Engineering Journal, v. 6, n. 7 (1 juillet 2020).