@article{RSMUP_1987__77__135_0,
     author = {Heineken, H.},
     title = {A remark on subgroup lattices of finite soluble groups},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {135--147},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {77},
     year = {1987},
     mrnumber = {904616},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1987__77__135_0/}
}