1. A laboratory study of the photoelastic stressmeter;Roberts;Int. J. Rock Mech. Min. Sci.,1965
2. Some field applications of the photoelastic stressmeter;Roberts;Int. J. Rock. Mech. Min. Sci.,1965
3. Measurement of Variation in Stress with a Photoelastic Stressmeter;Hiramatsu,1964
4. Glass insert stressmeters;Barron;Trans. Am. Inst. Min. Engrs,1965