@article{10_4153_CJM_2012_021_6,
     author = {Grandjean, Vincent},
     title = {On {Hessian} {Limit} {Directions} along {Gradient} {Trajectories}},
     journal = {Canadian journal of mathematics},
     pages = {808--822},
     year = {2013},
     volume = {65},
     number = {4},
     doi = {10.4153/CJM-2012-021-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2012-021-6/}
}