4Raul Velasqucz, Mihai O. Marasteanu, Ray Hozalski, et al. preliminary laboratory investigation of enzyme solutions as a soil stabilizer. University of Minnesota Department of Civil Engineering. 2005 ,final report.
5http ://www. patentstorm. us/patents/6695545, html 中的 US Patent 6695545 - Soil stabilization composition.