| article html file updated | 26 September 2022 12:35 CEST | Original file | https://www.mdpi.com/2504-3900/2/1/75 |
| article pdf uploaded. | 13 March 2018 13:30 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/1/75/pdf |
| article pdf uploaded. | 3 January 2018 12:53 CET | Version of Record | https://www.mdpi.com/2504-3900/2/1/75/pdf-vor |
