@article{10_1017_S0017089512000481,
     author = {GRANT, MARK},
     title = {ON {SELF-INTERSECTION} {INVARIANTS}},
     journal = {Glasgow mathematical journal},
     pages = {259--273},
     year = {2013},
     volume = {55},
     number = {2},
     doi = {10.1017/S0017089512000481},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089512000481/}
}