@article{10_4064_am_13_4_481_492,
     author = {Z. A. {\L}omnicki},
     title = {Some remarks on the enumeration of rooted trees},
     journal = {Applicationes Mathematicae},
     pages = {481--492},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {1972},
     doi = {10.4064/am-13-4-481-492},
     zbl = {0268.05117},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-13-4-481-492/}
}