Burgoon, J. K.; Jones, S. B. (1976). «Toward a Theory of Personal Space Expectations and Their Violations». Human Communication Research2 (2): 131-146. doi:10.1111/j.1468-2958.1976.tb00706.x.
Burgoon, J. K.; Hale, J. L. (1988). «Nonverbal Expectancy Violations: Model Elaboration and Application to Immediacy Behaviors». Communication Monographs55: 58-79. doi:10.1080/03637758809376158.