@article{CMJ_2001_51_1_a3,
     author = {Kahane, Charles S.},
     title = {A gradient estimate for solutions of the heat equation. {II}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {39--44},
     year = {2001},
     volume = {51},
     number = {1},
     mrnumber = {1814630},
     zbl = {1079.35037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2001_51_1_a3/}
}