@article{SLC_2012-2013_68_a2,
     author = {G\'erard H. E. Duchamp and Nguyen Hoang-Nghia and Adrian Tanasa},
     title = {A {Word} {Hopf} {Algebra} {Based} on the {Selection/Quotient} {Principle}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {68},
     year = {2012-2013},
     url = {http://geodesic.mathdoc.fr/item/SLC_2012-2013_68_a2/}
}