Frequently Asked Questions (sspx.org)

Frequently asked questions about the SSPX (archives.sspx.org)

Most asked questions about FSSPX (holycrossseminary.com)

The role of FSSPX in the the Church

Questions and answers about FSSPX (catholicapologetics.info)

A Canonical & Theological Study on the FSSPX by SISI NONO

Articles on defense of FSSPX and Abp. M. Lefebvre (catholicapologetics.info)

A Defense of the Society of St. Pius X and it's current legal Status by Mario Derksen

Extensive documentation on the Asian District site