@article{SLC_2014-2015_71_a1,
     author = {Mahdi J. Hasan Al-Kaabi},
     title = {Monomial {Bases} for {Free} {Pre-Lie} {Algebras}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2014-2015},
     volume = {71},
     url = {http://geodesic.mathdoc.fr/item/SLC_2014-2015_71_a1/}
}