Ulusay, R. And Erguler, Z. A. 2012. Needle penetration test: Evaluation of its performance and possible uses in predicting strength of weak and soft rocks. ENGINEERING GEOLOGY , vol.149 , 47-56.

Ulusay, R., & Erguler, Z. A., (2012). Needle penetration test: Evaluation of its performance and possible uses in predicting strength of weak and soft rocks. ENGINEERING GEOLOGY , vol.149, 47-56.

Ulusay, R., And Z. A. Erguler. "Needle penetration test: Evaluation of its performance and possible uses in predicting strength of weak and soft rocks," ENGINEERING GEOLOGY , vol.149, 47-56, 2012

Ulusay, R. And Erguler, Z. A. . "Needle penetration test: Evaluation of its performance and possible uses in predicting strength of weak and soft rocks." ENGINEERING GEOLOGY , vol.149, pp.47-56, 2012

Ulusay, R. And Erguler, Z. A. (2012) . "Needle penetration test: Evaluation of its performance and possible uses in predicting strength of weak and soft rocks." ENGINEERING GEOLOGY , vol.149, pp.47-56.

@article{article, author={R. Ulusay And author={Z. A. Erguler}, title={Needle penetration test: Evaluation of its performance and possible uses in predicting strength of weak and soft rocks}, journal={ENGINEERING GEOLOGY}, year=2012, pages={47-56} }