1. Multilateral Recognition Agreement,2017
2. ASTM, Standard Guide for Using the Surface Ground Penetrating Radar Method for Subsurface Investigation, D6432,2011
3. Ground Penetrating Radar, Theory and Practice;Utsi E. C.,2017
4. Ground Penetrating Radar Theory and Applications;Jol H.,2009
5. Benchmarking of GPR Equipment for Road Surveys;Maijala P.;MaraNord Work Package 3 Report,2011