@article{MM2_1981__34_154773,
     author = {A. Simis and J.F. Andrade},
     title = {On the {Grade} of {Some} {Ideals.}},
     journal = {Manuscripta mathematica},
     pages = {241--254},
     publisher = {mathdoc},
     volume = {34},
     year = {1981},
     zbl = {0468.13016},
     url = {http://geodesic.mathdoc.fr/item/MM2_1981__34_154773/}
}