@article { Weiser1991,
	title = {The Computer for the 21st Century},
	journal = {Scientific American},
	year = {1991},
	month = {02/1991},
	keywords = {RFID},
	URL = {http://www.ubiq.com/hypertext/weiser/SciAmDraft3.html},
	author = {Mark Weiser}
}