Henryk Rybinski, Boleslaw K. Szymanski. Multilevel information system-- Towards more flexible information retrieval systems. Inf. Process. Manage., 17(5):277-290, 1981. [doi]
@article{RybinskiS81,
title = {Multilevel information system-- Towards more flexible information retrieval systems},
author = {Henryk Rybinski and Boleslaw K. Szymanski},
year = {1981},
doi = {10.1016/0306-4573(81)90021-2},
url = {http://dx.doi.org/10.1016/0306-4573(81)90021-2},
tags = {information retrieval},
researchr = {https://researchr.org/publication/RybinskiS81},
cites = {0},
citedby = {0},
journal = {Inf. Process. Manage.},
volume = {17},
number = {5},
pages = {277-290},
}