Berhanu, S.
An introduction to involutive structures - Cambridge Cambridge University Press 2008 - xii, 392p. - New Mathematical monographs: 6. .
978-0-521-87857-9
An introduction to involutive structures - Cambridge Cambridge University Press 2008 - xii, 392p. - New Mathematical monographs: 6. .
978-0-521-87857-9