About this article
Published Online: Dec 31, 2020
Page range: 39 - 52
Received: May 02, 2019
Accepted: Jul 29, 2019
DOI: https://doi.org/10.2478/aupcsm-2020-0004
Keywords
© 2020 Robert Laterveer, published by Sciendo
This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.
Laterveer, Robert
Institut de Recherche Mathématique Avancée, CNRS – Université de StrasbourgFrance