@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 },
}