1. R.W. Mann, Elastic wave propagation in paper, Doctor thesis, The Institute of Paper Chemistry, Lawrence University, Appleton Wisconsin, January 1979.
2. Nondestructive sonic measurement of paper elasticity;Craver;Tappi,1965
3. The strength characterization of kraft paper by means of sonic pulse velocity measurements;Jackson;Svensk. Papperstid.,1967
4. Plate wave resonance – a contactless test method;Luukkala;Ultrasonics,1971
5. Ultrasonic plate waves in paper;Habeger;Ultrasonics,1979