Graphs and Order The Role of Graphs in the Theory of Ordered Sets and Its Applications
1985 年出版796 页ISBN:9027719438
Division of Powers in European Union Law The Delimitation of Internal Competence between the EU and
2009 年出版338 页ISBN:9789041126153
TRADITIONS OF IGBO ORIGIN:A STUDY OF PRE-COLONIAL POPULATION MOVEMENTS IN AFRICA REVISED EDITION
1994 年出版234 页ISBN:0820424811