Jusupov, Artur - C42 Petroffs Defence.pdf (8.97 MB)
http://www.multiupload.com/OB0R0HZ5HH

Forintos, Gyozo & Haag, Ervin - Petroffs Defence.pdf (9.07 MB)
http://www.multiupload.com/9285JVDWHV

Janjgava L. - The Petroff [2001].241s.pdf (5.79 MB)
http://www.multiupload.com/5STRO0EF2Z