Pengarang: Giuliano Grossi, Massimo Marchi, Enrico Pontelli, and Alessandro Provetti | No. Panggil: Journal of Logic and Computation August 2009, 19 (4), p. 697-715 |
Pengarang: Aschalew D. Tigabu, Frans Berkhout, Pieter van Beukering | No. Panggil: Science and Public Policy (Volume 42 Issue 5 October 2015, p. 614-631) |