Hi, i have had problems with this earlier, and i agree vidh Olivier, that Zentralblatt's database is pretty good, i've even created a simple program wich loads them easily to JabRef or any BibTex files. It works properly, try it out if you are interested. You can find it at https://sites.google.com/site/jabrefzentralblatt. No install or anything needed. Regards, A.