Most Substantial Commentary on Hebrews in Spanish?

I have come across what appears to be the most substantial commentary on Hebrews - at least what I have found to date:

Samuel Pérez Millos. Hebreos. Comentario Exegético al Texto Griego del Nuevo Testamento. Viladecavalls (Barcelona), Spain: Editorial Clie, 2009.

The commentary weighs in at 865 pages. It begins with a roughly 40 page introduction dealing with canonicity, authorship, destination, reason for writing, date and place, theme, relation of the epistle with the Old and New Testaments, and the relation of the epistle to biblical theology. This is followed by a verse-by-verse commentary on the Greek text.

The commentary has very little footnotes and the bibliography is only a little over two pages with mostly works in Spanish (many translated from English) and a few in English. So, it may not have the same level of academic rigor as some of the more technical commentaries found in other languages. But to date I have not found anything more substantial in the Spanish language.

It just happens to be available for download on the internet.