Yulia Kempner, Ilya B. Muchnik. Quasi-concave functions on meet-semilattices. Discrete Applied Mathematics, 156(4):492-499, 2008. [doi]
@article{KempnerM08,
title = {Quasi-concave functions on meet-semilattices},
author = {Yulia Kempner and Ilya B. Muchnik},
year = {2008},
doi = {10.1016/j.dam.2006.12.005},
url = {http://dx.doi.org/10.1016/j.dam.2006.12.005},
researchr = {https://researchr.org/publication/KempnerM08},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {156},
number = {4},
pages = {492-499},
}