@inbook{ :21-40,

author = { } ,

title = { ENHANCEMENT OF CONVERSATIONAL AGENTS BY MEANS OF MULTIMODAL INTERACTION },

booktitle = { CONVERSATIONAL AGENTS AND NATURAL LANGUAGE INTERACTION: TECHNIQUES AND EFFECTIVE PRACTICES },

isbn = { 9781609606176 },

publisher = { Igi Global },

pages = { 21 - 40 },

year = { 2011 },

}