@article{MASLO_1985__35_1_a5,
     author = {Ramana Murty, P.V. and Raman, V.},
     title = {Permutability of distributive congruence relations in a joint semilattice directed below},
     journal = {Mathematica slovaca},
     pages = {43--49},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {1985},
     mrnumber = {783961},
     zbl = {0579.06005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1985__35_1_a5/}
}