[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>


[1] [CITE@en[Custom State Pseudo Class]]
([TIME[2019-12-12 22:59:19 +09:00]])
<https://wicg.github.io/custom-state-pseudo-class/>

[2] [CITE@en[WICG/custom-state-pseudo-class]]
([TIME[2019-12-18 17:15:39 +09:00]])
<https://github.com/WICG/custom-state-pseudo-class>