| article html file updated | 26 September 2022 13:08 CEST | Original file | https://www.mdpi.com/2504-3900/2/6/271 |
| article pdf uploaded. | 23 March 2018 06:24 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/6/271/pdf |
| article pdf uploaded. | 23 February 2018 08:48 CET | Version of Record | https://www.mdpi.com/2504-3900/2/6/271/pdf-vor |
