Mark D. Apperley, Robert Spence. Hierarchical Dialogue Structures in Interactive Computer Systems. Software: Practice and Experience, 13(9):777-790, 1983.
@article{ApperleyS83, title = {Hierarchical Dialogue Structures in Interactive Computer Systems}, author = {Mark D. Apperley and Robert Spence}, year = {1983}, researchr = {https://researchr.org/publication/ApperleyS83}, cites = {0}, citedby = {0}, journal = {Software: Practice and Experience}, volume = {13}, number = {9}, pages = {777-790}, }