Free Download Chaotic billiards… By Nikolai Chernov, Roberto Markarian Publisher American Mathematical Society 2006 ISBN 0-8218-4096-7,9780821840962,19-1973-407-4,78-1980-247-2,261-2000-13-5,94-1999-513-5,13-1968-197-2,30-1988-219-2,91-1939-261-3,24-2004-177-1..