@article{IM_1984__76_143127,
     author = {M.E. Gage},
     title = {Curve shortening makes convex curves circular.},
     journal = {Inventiones mathematicae},
     pages = {357--364},
     year = {1984},
     volume = {76},
     zbl = {0542.53004},
     url = {http://geodesic.mathdoc.fr/item/IM_1984__76_143127/}
}