| article html file updated | 7 February 2020 15:51 CET | Update | https://www.mdpi.com/2077-0472/6/4/49 |
| article html file updated | 5 May 2019 02:33 CEST | Update | N/A |
| article html file updated | 28 December 2016 05:08 CET | Update | N/A |
| article html file updated | 8 October 2016 03:54 CEST | Original file | N/A |
| article xml uploaded. | 8 October 2016 03:52 CEST | Update | https://www.mdpi.com/2077-0472/6/4/49/xml |
| article xml uploaded. | 8 October 2016 03:52 CEST | Original file | N/A |
| article pdf uploaded. | 8 October 2016 03:52 CEST | Updated version of record | https://www.mdpi.com/2077-0472/6/4/49/pdf |
| article pdf uploaded. | 7 October 2016 16:33 CEST | Version of Record | N/A |
