| article html file updated | 30 August 2025 00:24 CEST | Update | https://www.mdpi.com/1660-3397/15/2/31 |
| article html file updated | 16 July 2022 04:51 CEST | Update | - |
| article html file updated | 7 February 2020 23:19 CET | Update | - |
| article html file updated | 23 September 2019 07:30 CEST | Update | - |
| article html file updated | 4 May 2019 11:24 CEST | Update | - |
| article html file updated | 2 March 2017 09:37 CET | Update | - |
| article html file updated | 17 February 2017 08:03 CET | Update | - |
| article xml uploaded. | 17 February 2017 08:02 CET | Update | https://www.mdpi.com/1660-3397/15/2/31/xml |
| article pdf uploaded. | 17 February 2017 08:02 CET | Updated version of record | https://www.mdpi.com/1660-3397/15/2/31/pdf |
| article html file updated | 14 February 2017 06:38 CET | Original file | - |
| article xml uploaded. | 14 February 2017 06:37 CET | Original file | - |
| article pdf uploaded. | 14 February 2017 06:37 CET | Version of Record | https://www.mdpi.com/1660-3397/15/2/31/pdf-vor |
