| article html file updated | 7 February 2020 20:42 CET | Update | https://www.mdpi.com/2075-163X/7/1/4 |
| article html file updated | 22 September 2019 17:25 CEST | Update | N/A |
| article html file updated | 4 May 2019 16:59 CEST | Update | N/A |
| article html file updated | 7 February 2017 10:27 CET | Update | N/A |
| article html file updated | 3 January 2017 10:17 CET | Original file | N/A |
| article xml uploaded. | 3 January 2017 10:16 CET | Original file | https://www.mdpi.com/2075-163X/7/1/4/xml |
| article pdf uploaded. | 3 January 2017 10:16 CET | Version of Record | https://www.mdpi.com/2075-163X/7/1/4/pdf |
