Sprengling M.
1940.
The Berlin Druze Lexicon. :SERIES:A.J.S.L.;VOLUME:LVII;PAGES:75ff..
Ivanow W..
1940.
Ismailis and Qarmatians. :SERIES:J.B.B.R.A.S.;VOLUME:n.s.XVI;PAGES:43-85.
Fyzee AAA.
1940.
Materials for an Ismaili Bibliography: 1936-1938. :SERIES:J.B.B.R.A.S.n.s.;VOLUME:XVI;PAGES:99-101.