Du, D., & Ko, K.-I. [ca. 2014]. Theory of computational complexity. In Wiley series in discrete mathematics and optimization (2 nd ed) [Cd]. Hoboken, NJ: J. Wiley & Sons.

DU, Dingzhu und KO, Ker-I., 2014. Theory of computational complexity. 2 nd ed. Hoboken, NJ: J. Wiley & Sons. ISBN 9781118594971.

Du, D., und K.-I. Ko. „Theory of computational complexity“. Wiley series in discrete mathematics and optimization, 2 nd ed, cd, J. Wiley & Sons, 2014.

Du, Dingzhu/Ko, Ker-I.: Theory of computational complexity, 2 nd ed. Aufl. Hoboken, NJ 2014.

Du, D. und Ko, K.-I. (2014), Theory of computational complexity, Wiley series in discrete mathematics and optimization, 2 nd ed., Bd. , J. Wiley & Sons, Hoboken, NJ.