Russisch-Orthodoxe Kerk in het Buitenland (ROCOR) (Noord-Amerika, Verenigde Staten van Amerika). Officiële website
"Ustav" facilitates email discussion, questions, commentary and teaching concerning the traditional Orthodox Christian typicon and music. The list is for traditional Orthodox Christians who love the church and it's typicon, and want to learn more about it, and help others to learn about it, or anyone who wishes to learn about the beauty and theological profundity of Orthodox Christian worship and music.