@article{GDZPPN002485109,
title = {A Characterization of Motions as Bijections Preserving Inradius or Circumradius One.},
journal = {Monatshefte f\"ur Mathematik},
volume = {102},
year = {1986},
pages = {151-158},
zbl = {0583.51014},
url = {http://dml.mathdoc.fr/item/GDZPPN002485109}
}
Lester, J.A. A Characterization of Motions as Bijections Preserving Inradius or Circumradius One.. Monatshefte für Mathematik, Tome 102 (1986) pp. 151-158. http://gdmltest.u-ga.fr/item/GDZPPN002485109/