| article html file updated | 26 September 2022 12:23 CEST | Original file | https://www.mdpi.com/2504-3900/2/1/8 |
| article pdf uploaded. | 20 March 2018 03:12 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/1/8/pdf |
| article pdf uploaded. | 15 January 2018 04:18 CET | Version of Record | https://www.mdpi.com/2504-3900/2/1/8/pdf-vor |
