Bishko, Charles J. (1964), «The liturgical Context of Fernando I last days according to the so-called “Historia Silense”», Hispania Sacra, 17, pp. 47-59.
Bishko, Charles J. (1964), «The liturgical Context of Fernando I last days according to the so-called “Historia Silense”», Hispania Sacra, 17, pp. 47-59.