@article{PMATES_2004__48_2_41501,
     author = {Petteri Harjulehto and Juha Kinnunen},
     title = {Differentiation bases for {Sobolev} functions on metric spaces.},
     journal = {Publicacions Matem\`atiques},
     pages = {381-395},
     volume = {48},
     number = {2},
     year = {2004},
     zbl = {an:1074.46023},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/PMATES_2004__48_2_41501/}
}