Barwick, Susan. Unitals in projective planes [electronic resource] / by Susan Barwick, Gary Ebert. - New York, NY : Springer-Verlag New York, 2008. - xii, 193 p. : ill., digital ; 24 cm. - Springer monographs in mathematics, 1439-7382 . ISBN: 9780387763668 (electronic bk.) 9780387763644 (paper) Subjects--Topical Terms: Projective planes.Combinatorics.Algebra.Geometry.Mathematics.Group Theory and Generalizations. LC Class. No.: QA471 / .B37 2008 Dewey Class. No.: 516.5