Artist's webpage: http://members.jcom.home.ne.jp/sdf1/index.html
Pixiv account: http://www.pixiv.net/member.php?id=2703034
https://www.pixiv.net/users/2703034
https://www.pixiv.net/stacc/sdf1macross
https://twitter.com/cvs101
https://twitter.com/intent/user?user_id=264668218
https://www.tinami.com/creator/profile/1624
http://machinerobo.web.fc2.com