Earcons and Icons: Their Structure and Common Design Principles. - Meera Blattner; Denise A. Sumikawa; Robert M. Greenberg (Hum. Comput. Interact., 1989)

Earcons and Icons: Their Structure and Common Design Principles (Abstract only). - Meera Blattner; Denise A. Sumikawa; Robert M. Greenberg (ACM SIGCHI Bull., 1989)