@article{TM2_2011_XIV_2_a7,
     author = {Vladimir N. Gruji\'c},
     title = {Three manifestations of {Morse} theory in two dimensions},
     journal = {The Teaching of Mathematics},
     pages = {137 },
     publisher = {mathdoc},
     volume = {XIV},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2011_XIV_2_a7/}
}