Most of the commentaries, opinions and reviews appearing in this encyclopedia
are the result of a compilation task of personal communications o quests
on the net. When those opinions are significative (something more than to
say just the kind of music performed by a given band) and, nevertheless I
ignore the authory, a (?) appears at the end of them.
On the contrary, the author's name is placed. Below a collaboration list
appears without which this encyclopedia would not be possible. My thanks to
all of them.