1. Horizontal directional drilling: profile of an emerging industry;Allouche;ASCE J. Constr. Eng. Manage.,2000
2. Standards ASTM. 1999. Standard Guide for Use of Maxi-Horizontal Directional Drilling for Placement of Polyethylene Pipe or Conduit Under Obstacles including River Crossings, Vol. 80.04, F1962–1999
3. Embattled HDD industry sees change as necessary, ultimately beneficial;Carpenter;Underground Constr.,2002
4. HDD saves Indiana highway project;Gokhale;Direct. Drilling, Trenchless Technol. Inc.,1999
5. On the rise: gravity sewers and HDD;Harper;Direct. Drilling, Trenchless Technol. Inc.,1999