Sergey Dorichenko

S D ยท Sergio Deragna

titleISBN-13
(ISBN-10)
year of publication
A Moscow Math Circle: Week-by-Week Problem Sets978-O-8218-6874-4
(O-8218-6874-8)
2011

Sergey Dorofeev

While admiring the
barbers, Germany attached
without sweeping air