@article{10_4153_CJM_1975_052_3,
     author = {Webster, Dallas E.},
     title = {Handles, {Semihandles,} and {Destabilization} of {Isotopies}},
     journal = {Canadian journal of mathematics},
     pages = {439--445},
     year = {1975},
     volume = {27},
     number = {2},
     doi = {10.4153/CJM-1975-052-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-052-3/}
}