@article{AFM_2002_27_1_a9,
     author = {Valentino Magnani},
     title = {On a general coarea inequality and applications},
     journal = {Annales Fennici Mathematici},
     pages = {121--140},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2002_27_1_a9/}
}