E.F. LaFond, C.C. Habeger, R.E. Russo, Ted Jackson, P.L. Ridgway, Laser ultrasonic system for online measurement of elastic properties of paperJournal Name: Journal of Pulp and Paper Science; Journal Volume: 29; Journal Issue: 9; Other Information: Journal Publication Date: August 2003. ,vol. 29, pp. 289- 293 ,(2003)