According to the Jewish Encyclopedia article on Rome:

Jewish Encyclopedia article for Helbo, by M. Seligsohn et al.

The Jewish Encyclopedia article cites the following references:

The Jewish Encyclopedia article on Jesus notes:

The Jewish Encyclopedia article on which this discussion is largely based estimates only 314,000 Sephardic Jews at the end of the 19th century.

According to the Jewish Encyclopedia article on circumcision of proselytes:

The following bibliography is referred to in the Jewish Encyclopedia article:

The following is a reconstruction of some other references used in that Jewish Encyclopedia article but not explicitly mentioned in its bibliography:

The Jewish Encyclopedia article refers to this as "A commentary to Chronicles (ed.

The Jewish Encyclopedia article from which this derives relies heavily on material from the Talmud.