1. Force Mains Sulzer Brothers Catalog 1931
2. Sulzer Patented Stiffening Collars on the Branches of High-Pressure Pipelines for Hydroelectric Power Works Sulzer Tech. Rev. 2 10 1941
3. Reinforcement of Branch Pieces;Blair;Engineering (Br.),1946
4. Reinforcement of Branch Pieces;Blair;Engineering (Br.),1947