El Románico en Vasconia = The Romanesque in the Basque Country = Euskal Erromanikoa / [textos y diseño, J. Ramón Fernández]

Mondragón : MCC , 1995

Spanish medieval art : recent studies / edited by Colum Hourihane

Tempe : Arizona Center for Medieval and Renaissance Studies ; Princenton : The Index of Christian Art Princeton University , 2007