@article{MASLO_2006__56_1_a7,
     author = {Gr\"atzer, G. and Lakser, Harry},
     title = {Freely adjoining a complement to a lattice},
     journal = {Mathematica slovaca},
     pages = {93--104},
     publisher = {mathdoc},
     volume = {56},
     number = {1},
     year = {2006},
     mrnumber = {2217582},
     zbl = {1164.06308},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_2006__56_1_a7/}
}