Demorgan, A. Elements of algebra : preliminary to the differential calculus and fit for the higher classes of schools in which the principles of arithmetic are taught / by Augustus Demorgan; A. Demorgan .— 2 edition .— : Printed for Taylor and Walton, 1837 .— 299 с. — Lang: eng .— URL: https://rucont.ru/efd/128226 (дата обращения: 28.06.2024)