One of the most widely viewed Comparative Video 101 articles was on this song in 2010, and it included this Monkees' rendition among several other excellent versions, including the KT's. An added bonus is that the first rendition in the piece from David W. Solomons includes a translation of the lyrics, and the rest of the essay is the usual CV101 context and history of the tune.
https://compvid101.blogspot.com/2010/01/riu-riu-chiuguardo-del-lobo.html