TY - BOOK AU - Chartrand,Gary AU - Lesniak,Linda AU - Zhang,Ping TI - Graphs & digraphs T2 - Textbooks in mathematics SN - 9781498735766 (hbk.) PY - 2016/// CY - Boca Raton, FL PB - CRC Press KW - Graph theory KW - Directed graphs N1 - Includes bibliographical references and index ER -