@article{GDZPPN002287617,
title = {Recursive Digraphs, Splinters and Cylinders.},
journal = {Mathematische Annalen},
volume = {137},
year = {1959},
pages = {211-218},
zbl = {0087.25103},
url = {http://dml.mathdoc.fr/item/GDZPPN002287617}
}
MYHILL, J. Recursive Digraphs, Splinters and Cylinders.. Mathematische Annalen, Tome 137 (1959) pp. 211-218. http://gdmltest.u-ga.fr/item/GDZPPN002287617/