An example of the kind of research included on the site is this English abstract of a 2001 article by Ricardo Tacuchian, Academia Brasileira de Música, Universidade do Rio de Janeiro, entitled "Um Requiem para Villa-Lobos":
"An hermeneutic approach of the Second Suite for Chamber Orchestra by Villa-Lobos points it out not only as a swan-song but also as a requiem for the composer himself. This last work by Villa-Lobos is a synthesis of his artistic trajectory, with candidly European, caboclo and African ambiances. Despite its great simplicity the piece holds elements that characterize the musician’s style. Besides symbolizing the composer’s multiple aesthetic aims the piece imparts his ultimate self-biography and his current painful soul."
That short description makes one wish for an English translation (which I'll try to have done, and posted on the HVL Website). It also, of course, points to the fact that the Second Suite is presently without a current recording on CD. Prof. Tacuchian's article comes from the Brasil 2000 Colóquio/Kolloquium entitled "J.S.BACH-H.VILLA-LOBOS Interpretações e Perspectivas do Barroco / Deutungen und Perspektiven des Barock."
The ISMPS website itself, by the way, includes a useful bibliography of monographs and periodical articles in many languages, with a focus on German and Portuguese.