@article{MM2_1983__41_154912,
     author = {Manohar L. Madan and Joseph G. D'Mello},
     title = {Class {Group} {Rank} {Relations} in {Zl-Extensions.}},
     journal = {Manuscripta mathematica},
     pages = {75--108},
     publisher = {mathdoc},
     volume = {41},
     year = {1983},
     zbl = {0516.12012},
     url = {http://geodesic.mathdoc.fr/item/MM2_1983__41_154912/}
}