[17] [CITE[CSS Extensions for Multimodal Interaction]]
( ([TIME[2004-12-15 04:05:11 +09:00]] 版))
<http://www.w3.org/People/Raggett/css-mmi/#next>

[18] [CITE[CSS Extensions for Multimodal Interaction]]
( ([TIME[2004-12-15 04:05:11 +09:00]] 版))
<http://www.w3.org/People/Raggett/css-mmi/#state>