@article{10_1017_S0017089514000275,
     author = {BUJALANCE, E. and ETAYO, J. J. and MART\'INEZ, E. and SZEPIETOWSKI, B.},
     title = {ON {THE} {CONNECTEDNESS} {OF} {THE} {BRANCH} {LOCI} {OF} {NON-ORIENTABLE} {UNBORDERED} {KLEIN} {SURFACES} {OF} {LOW} {GENUS}},
     journal = {Glasgow mathematical journal},
     pages = {211--230},
     year = {2015},
     volume = {57},
     number = {1},
     doi = {10.1017/S0017089514000275},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089514000275/}
}