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