1. Anwendung der Schattenoptik zur Untersuchung des Zerreissvorgangs von Platten;Manogg,1964
2. Determination of crack-opening displacement by the method of caustics;Theocaris;J. Strain Anal.,1974
3. Experimental determination of dynamic stress intensity factors by shadow patterns;Beinert,1981
4. Elastic stress intensity factors evaluated by caustics;Theocaris,1981
5. Shadow optical method of caustics;Kalthoff,1987