Leila De Floriani Paola Magillo Enrico Puppo Data Structures for Simplicial Multi-complexes. 33-51 SSD/1999/16510033.pdf 1999 conf/ssd/99 SSD https://doi.org/10.1007/3-540-48482-5_5 https://www.wikidata.org/entity/Q56985794 db/conf/ssd/ssd99.html#FlorianiMP99