@article{QUE_1990_1990_1_a0,
     author = {Corominas, Albert},
     title = {Elementos para el c\'alculo de costes fijos y variables de elementos productivos.},
     journal = {Q\"uestii\'o},
     pages = {123-137},
     publisher = {mathdoc},
     volume = {14},
     number = {1-2-3},
     year = {1990},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/QUE_1990_1990_1_a0/}
}