Bregel, Yuri. "Religion." In Bibliography of Islamic Central Asia, Part I: History; Religion; Culture, 671-712. Bloomington, IN: Research Institute for Inner Asian Studies, Indiana University, 1995.

Bregel's bibliography is three two-inch thick volumes covering everything to do with Central Asia.  The section on religion is only one section of the bibliography and works touching on Islam in Central Asia might be found in other sections.  Most of the works are in Russian or other Central Asian languages.  Because this bibliography is so comprehensive, it appears to be a great tool for researching foreign sources on Central Asia.  It's main limitation is that it was published in 1995 and does not include the many subsequent publications, including those in English, on the region.

Relevent Sections: Islam (General; Islamization; Islam under Russian Rule; Islam under Chinse Rule; Theology and Law; Sects (Ismailiyya; Other); Sufism (General, Early Sufism; Under Russian Rule; Under Chinese Rule; Sufi Orders: Naqshabandiyya; Sufi Orders: Yasaviyya; Sufi Orders: Kubraviyya; Sufi Orders:Other); Saints and Holy Places; Popular Beliefs and Practices.  Descriptors: 1990s, B, bibliography, chapter, post-Soviet, pre-Tsarist, Soviet, Tsarist