Snoha, Lubomir Max Planck Institute for Mathematics, Max Planck Society;
Downarowicz, Tomasz Max Planck Institute for Mathematics, Max Planck Society;
Snoha, L., Downarowicz, T., Maličký, P., & Špitalský, V. (2006). Measure of noninvertibility of minimal maps. Journal of Mathematical Analysis and Applications, 317(2), 714-723. doi:10.1016/j.jmaa.2005.08.082.