C. Haag
- Hydrophobierung des Betons - Ökologische und ökonomische Aspekte / Water Repellent Treatment of Concrete - ecological and economical aspects. Dans: Restoration of Buildings and Monuments, v. 3, n. 3 (juin 1997). (1997):
- Ökologische Betrachtungen zur Dauerhaftigkeit eines Stahlbetonbauteils / Ecological considerations concerning durability of a reinforced concrete structural member. Dans: Restoration of Buildings and Monuments, v. 3, n. 2 (avril 1997). (1997):