Eugen, lade mal von hier das PDF von Chapter 1, da steht alles was man zur Haltbarkeit derzeit wissen muss:
[url="http://www.wilhelm-research.com/book_toc.html"]http://www.wilhelm-research.com/book_toc.html[/url]
Gru?Wolfgang
[url="http://www.wilhelm-research.com/book_toc.html"]http://www.wilhelm-research.com/book_toc.html[/url]
Gru?Wolfgang