Welcome Sergio!

Have you ever done research in a library? Discussing things on this site reminds me of that. You set out with an idea, and you start on a book that has a little info but has a bibliography in the back, and you start looking into the books there, and they lead you to others, and one day you get what you want, or else, you get more interesting stuff than what you began to research!

Some of the people on this site are true encyclopedias. But they may not be on when you are. If a request of yours dies, don't despair, wait a couple days, try again. I hope you are impressed that already, you have located Bernard here. What other site could you go to and locate another person, so knowledgable, so quickly?

Take it easy, persevere, and I am sure your time here will be rewarding for you.