Rudolf Krawczyk. Conditionally isotone interval operators. Computing, 39(3):261-270, 1987. [doi]
@article{Krawczyk87,
title = {Conditionally isotone interval operators},
author = {Rudolf Krawczyk},
year = {1987},
doi = {10.1007/BF02309559},
url = {http://dx.doi.org/10.1007/BF02309559},
researchr = {https://researchr.org/publication/Krawczyk87},
cites = {0},
citedby = {0},
journal = {Computing},
volume = {39},
number = {3},
pages = {261-270},
}