Richard S. Crouch, Stephen G. Pulman. Time and Modality in a Natural Language Interface to a Planning System. Artificial Intelligence, 63(1-2):265-304, 1993.
@article{CrouchP93, title = {Time and Modality in a Natural Language Interface to a Planning System}, author = {Richard S. Crouch and Stephen G. Pulman}, year = {1993}, researchr = {https://researchr.org/publication/CrouchP93}, cites = {0}, citedby = {0}, journal = {Artificial Intelligence}, volume = {63}, number = {1-2}, pages = {265-304}, }