@article{AMBP_2007__14_1_93_0,
     author = {Satoshi  Ishiwata},
     title = {Discrete version of {Dungey{\textquoteright}s} proof for the gradient heat kernel estimate on coverings},
     journal = {Annales math\'ematiques Blaise Pascal},
     pages = {93--102},
     publisher = {Annales math\'ematiques Blaise Pascal},
     volume = {14},
     number = {1},
     year = {2007},
     doi = {10.5802/ambp.229},
     zbl = {1137.60033},
     language = {en},
     url = {https://ambp.centre-mersenne.org/articles/10.5802/ambp.229/}
}