место издания MSRI Mathematical Circles Library 4. Providence, RI: American Mathematical Society (AMS); Berkeley, CA: Mathematical Sciences Research Institute (MSRI), ISBN 978-0-8218-5363-4/pbk, 220 с.
место издания MSRI Mathematical Circles Library 7. Providence, RI: American Mathematical Society (AMS); Berkeley, CA: Mathematical Sciences Research Institute (MSRI). viii, USA, ISBN 978-0-8218-6906-2/pbk, 176 с.