Reference:

Harri Jäppinen, Timo Honkela, Heikki Hyötyniemi, and Aarno Lehtola. Stratified natural language database interface for finnish. In Proceedings of STeP'88, Finnish Artificial Intelligence Symposium, pages 793–802. Finnish Artificial Intelligence Society and University of Helsinki, 1988.

Suggested BibTeX entry:

@inproceedings{step88nlp,
    author = {Harri J{\"a}ppinen and Timo Honkela and Heikki Hy{\"o}tyniemi and Aarno Lehtola},
    booktitle = {Proceedings of STeP'88, Finnish Artificial Intelligence Symposium},
    pages = {793-802},
    publisher = {Finnish Artificial Intelligence Society and University of Helsinki},
    title = {Stratified Natural Language Database Interface for Finnish},
    year = {1988},
}