1. Duyvestyn, G.M., Knight M.A., Polak M.A., 2001. Excavation and analysis of two HDPE pipes installed using HDD construction techniques. No-Dig 2001. Nashville
2. Duyvestyn, G.M., Knight M.A., Polak, M.A., 2001. Measurement of HDPE pipeline axial load during horizontal directional drilling installation. Proceedings of Underground Construction Conference. Houston, Texas
3. Field tests on high-density polyethylene pipes installed using horizontal directional drilling;Gelinas;ASCE J. Infrastruct. Sys.,2000
4. A comprehensive survey on the state of horizontal directional drilling in North America provides an inside look at this increasingly growing industry;Gokhale;Directional Drilling,1999
5. Knight, M.A., Duyvestyn, G.M., Polak, M.A., (2002), Behaviour of polyethylene pipes installed using a midi horizontal directional drill. International No-Dig 2002. Copenhagen, May 2002