@article{10_2140_agt_2006_6_935,
     author = {Levine, Jerome},
     title = {Labeled binary planar trees and {quasi-Lie} algebras},
     journal = {Algebraic and Geometric Topology},
     pages = {935--948},
     year = {2006},
     volume = {6},
     number = {2},
     doi = {10.2140/agt.2006.6.935},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2006.6.935/}
}