Titu Andreescu, Oleg Mushkarov, Luchezar Stoyanov,
Paperback (274 pp.) Birkhäuser Boston (2005-12-08)
$69.99 ($79.95 list)
Emil Kolev, Peter Boyvalenkov, Nikolai Nikolov, Oleg Mushkarov,
Kindle Edition (159 pp.) GIL Publishing House (2007-10-15)
None ($9.99 list)
R. Todev,
Paperback (698 pp.) CreateSpace (2009-06-22)
$27.76 ($35.00 list)
