Henry Prakken, Marek J. Sergot. Contrary-to-Duty Obligations. Studia Logica, 57(1):91-115, 1996.
@article{PrakkenS96:1, title = {Contrary-to-Duty Obligations}, author = {Henry Prakken and Marek J. Sergot}, year = {1996}, researchr = {https://researchr.org/publication/PrakkenS96%3A1}, cites = {0}, citedby = {0}, journal = {Studia Logica}, volume = {57}, number = {1}, pages = {91-115}, }