| article html file updated | 17 August 2026 00:17 CEST | Update | https://www.mdpi.com/2076-3921/9/1/81 |
| article html file updated | 15 February 2020 03:59 CET | Update | N/A |
| article html file updated | 7 February 2020 14:32 CET | Update | N/A |
| article html file updated | 19 January 2020 09:46 CET | Original file | N/A |
| article xml uploaded. | 19 January 2020 09:45 CET | Original file | https://www.mdpi.com/2076-3921/9/1/81/xml |
| article pdf uploaded. | 19 January 2020 09:45 CET | Updated version of record | https://www.mdpi.com/2076-3921/9/1/81/pdf |
| article pdf uploaded. | 17 January 2020 16:59 CET | Version of Record | https://www.mdpi.com/2076-3921/9/1/81/pdf-vor |
