@article{AFM_2021_46_2_a21,
     author = {Behnam Esmayli and Piotr Haj{\l}asz},
     title = {The coarea inequality},
     journal = {Annales Fennici Mathematici},
     pages = {965--991},
     publisher = {mathdoc},
     volume = {46},
     number = {2},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2021_46_2_a21/}
}