@article{10_4064_sm175_3_5,
     author = {Gerd Herzog and Christoph Schmoeger},
     title = {On the functional equation defined
 by {Lie's} product formula},
     journal = {Studia Mathematica},
     pages = {271--277},
     publisher = {mathdoc},
     volume = {175},
     number = {3},
     year = {2006},
     doi = {10.4064/sm175-3-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm175-3-5/}
}