@article{10_1017_S0017089508004448,
     author = {BONGIORNO, B. and PIAZZA, L. DI and MUSIA{\L}, K.},
     title = {APPROXIMATION {OF} {BANACH} {SPACE} {VALUED} {NON-ABSOLUTELY} {INTEGRABLE} {FUNCTIONS} {BY} {STEP} {FUNCTIONS}},
     journal = {Glasgow mathematical journal},
     pages = {583--593},
     year = {2008},
     volume = {50},
     number = {3},
     doi = {10.1017/S0017089508004448},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089508004448/}
}