@article{JOLT_2012_22_1_a11,
     author = {Bogdan Ion},
     title = {A {Poincar\'e-Birkhoff-Witt} {Theorem} for {Hopf} {Algebras} with {Central} {Hopf} {Algebra} {Coradical}},
     journal = {Journal of Lie Theory},
     pages = {291--300},
     year = {2012},
     volume = {22},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2012_22_1_a11/}
}