Yesodot ha-tefilah : meḥḳar ʿal toldot ha-tefilah, meḳoroteha, minhageha u-ṭeʿameha, ʿad ʿarikhata bi-yeme ha-geʾonim - Leṿi, Eliʿezer ben Elyaḳim (Tsiyoni, 1961)