[1] [CITE[Android Cloud to Device Messaging Framework - Google Projects for Android]]
([TIME[2010-05-26 08:54:52 +09:00]] 版)
<http://code.google.com/intl/ja/android/c2dm/index.html>

[2] [CITE[Developer's Guide: Protocol - Google Contacts Data API - Google Code]]
([TIME[2010-08-17 20:48:27 +09:00]] 版)
<http://code.google.com/intl/ja/apis/contacts/docs/3.0/developers_guide_protocol.html>