Free Download Analysis on Graphs and Its Applications… By Pavel Exner, Jonathan P. Keating, Peter Kuchment, Toshikazu Sunada, and Alexander Teplyaev,..

Free Download Introduction to quantum graphs… By Gregory Berkolaiko, Peter Kuchment Publisher American Mathematical Society 2013 ISBN 0821892118,978-0-8218-9211-4,47-2012-530-1..