@article{10_21136_MB_1991_126177,
     author = {Jakub{\'\i}kov\'a-Studenovsk\'a, Danica},
     title = {Intervals in partial monounary algebras},
     journal = {Mathematica Bohemica},
     pages = {268--275},
     publisher = {mathdoc},
     volume = {116},
     number = {3},
     year = {1991},
     doi = {10.21136/MB.1991.126177},
     mrnumber = {1126448},
     zbl = {0752.08003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1991.126177/}
}