| article html file updated | 8 February 2020 23:26 CET | Update | https://www.mdpi.com/2079-9268/7/4/31 |
| article html file updated | 29 September 2019 01:29 CEST | Update | N/A |
| article html file updated | 2 May 2019 10:00 CEST | Update | N/A |
| article html file updated | 18 April 2019 07:39 CEST | Update | N/A |
| article html file updated | 8 December 2017 07:57 CET | Update | N/A |
| article xml uploaded. | 8 December 2017 07:56 CET | Update | https://www.mdpi.com/2079-9268/7/4/31/xml |
| article xml uploaded. | 8 December 2017 07:56 CET | Update | N/A |
| article pdf uploaded. | 8 December 2017 07:56 CET | Updated version of record | https://www.mdpi.com/2079-9268/7/4/31/pdf |
| article html file updated | 7 December 2017 14:10 CET | Original file | N/A |
| article xml uploaded. | 7 December 2017 14:09 CET | Original file | N/A |
| article pdf uploaded. | 7 December 2017 14:09 CET | Version of Record | https://www.mdpi.com/2079-9268/7/4/31/pdf-vor |
