Daepp, U. Reading, writing, and proving [Electronic resource] : a closer look at mathematics / U. Daepp, P. Gorkin. - Electronic text data. - New York, NY : Springer Science+Business Media LLC, 2011. - (Undergraduate texts in mathematics, ISSN 0172-6056). - ISBN 978-1-4419-9479-0 : Б. ц.