@article{TM_2011_275_a8,
     author = {Michael Baake and Ulrike Schl\"agel},
     title = {The {Peano--Baker} series},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {167--171},
     publisher = {mathdoc},
     volume = {275},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM_2011_275_a8/}
}