@article{10_4064_fm_132_3_189_194,
     author = {Zofia Adamowicz and Teresa Bigorajska},
     title = {Functions provably total in $I^{-}\ensuremath{\Sigma}_{n}$},
     journal = {Fundamenta Mathematicae},
     pages = {189--194},
     publisher = {mathdoc},
     volume = {132},
     number = {3},
     year = {1989},
     doi = {10.4064/fm-132-3-189-194},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-132-3-189-194/}
}