Media type: E-Article Title: Twin Roman domination number of a digraph Contributor: Ahangar, H. Abdollahzadeh; Amjadi, J.; Sheikholeslami, S.M.; Samodivkin, V.; Volkmann, L. imprint: Mathematical Notes, 2016 Published in: Miskolc Mathematical Notes Language: Not determined DOI: 10.18514/mmn.2016.1178 ISSN: 1787-2405; 1787-2413 Keywords: Control and Optimization ; Discrete Mathematics and Combinatorics ; Numerical Analysis ; Algebra and Number Theory ; Analysis Origination: Footnote: Access State: Open Access