@inproceedings{weko_158392_1,
   author	 = "Naofumi,Yoshida and Jun,Miyazaki",
   title	 = "A Novel Approach to Time-Space-Direction Algebra for Collaborative Work in Ubiquitous Environment",
   booktitle	 = "Proceedings of The Second International Conference on Collaboration Technologies",
   year 	 = "2006",
   volume	 = "2006",
   number	 = "",
   pages	 = "48--53",
   month	 = "jul"
}