1. ASTM International: http://www.astm.org/
2. ASTM C 12 - Standard Practice for Installing Vitrified Clay Pipe Lines
3. ASTM D 6103 - Standard Test Method for Flow Consistency of Controlled Low Strength Material (CLSM)
4. ASTM C 403 - Standard Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance
5. An investigation of the laws of plastic flow