@article{10_4064_fm_78_2_119_131,
     author = {Raymond Balbes},
     title = {On free pseudo-complemented and relatively pseudo-complemented semi-lattices},
     journal = {Fundamenta Mathematicae},
     pages = {119--131},
     publisher = {mathdoc},
     volume = {78},
     number = {2},
     year = {1973},
     doi = {10.4064/fm-78-2-119-131},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-78-2-119-131/}
}