| article html file updated | 7 February 2020 15:33 CET | Update | https://www.mdpi.com/2297-8747/21/4/39 |
| article html file updated | 5 May 2019 03:04 CEST | Update | N/A |
| article html file updated | 18 October 2016 16:58 CEST | Update | N/A |
| article xml uploaded. | 18 October 2016 16:57 CEST | Update | https://www.mdpi.com/2297-8747/21/4/39/xml |
| article xml uploaded. | 18 October 2016 16:57 CEST | Update | N/A |
| article pdf uploaded. | 18 October 2016 16:57 CEST | Updated version of record | https://www.mdpi.com/2297-8747/21/4/39/pdf |
| article html file updated | 26 September 2016 12:15 CEST | Original file | N/A |
| article xml uploaded. | 26 September 2016 11:47 CEST | Update | N/A |
| article xml uploaded. | 26 September 2016 11:47 CEST | Original file | N/A |
| article pdf uploaded. | 26 September 2016 11:47 CEST | Version of Record | https://www.mdpi.com/2297-8747/21/4/39/pdf-vor |
