@article{CM_1989__71_2_121_0,
     author = {Klapper, A.},
     title = {Selmer group estimates arising from the existence of canonical subgroups},
     journal = {Compositio Mathematica},
     pages = {121--137},
     publisher = {Kluwer Academic Publishers},
     volume = {71},
     number = {2},
     year = {1989},
     mrnumber = {1012637},
     zbl = {0751.14030},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1989__71_2_121_0/}
}