Kalawsky, Roy S. <br/><br/>
The science of virtual reality and virtual environments :  a technical, scientific and engineering reference on virtual environments / 
Roy S. Kalawsky 
 - Wokingham, Eng. :  Addison-Wesley,  1993 
 - 405 p. :  ill. ;  24 cm. 
<br/><br/>p. 357-386 
<br/><br/><label>ISBN: </label>0201631717  RM109.51 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Virtual reality<br/>Human--computer interaction