@article{TAC_2010_24_a9,
     author = {F. W. Lawvere and M. Menni},
     title = {The {Hopf} algebra of {M\"obius} intervals},
     journal = {Theory and applications of categories},
     pages = {221--265},
     year = {2010},
     volume = {24},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2010_24_a9/}
}