Daniel Hellström
- Natural Sludge Dewatering. II: Thawing-Drying Process in Full-Scale Sludge Freezing Ditches. In: Journal of Cold Regions Engineering, v. 11, n. 1 (March 1997). (1997):
- Natural Sludge Dewatering. I: Combination of Freezing, Thawing, and Drying as Dewatering Methods. In: Journal of Cold Regions Engineering, v. 11, n. 1 (March 1997). (1997):