@article{TRSPY_2010_270_a0,
     author = {F. Alharbi and V. Zakalyukin},
     title = {Quasi corner singularities},
     journal = {Informatics and Automation},
     pages = {7--20},
     publisher = {mathdoc},
     volume = {270},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2010_270_a0/}
}