| article html file updated | 9 February 2020 06:02 CET | Update | https://www.mdpi.com/2075-163X/8/2/57 |
| article html file updated | 30 September 2019 15:52 CEST | Update | - |
| article html file updated | 1 May 2019 19:47 CEST | Update | - |
| article html file updated | 17 April 2019 18:54 CEST | Update | - |
| article html file updated | 28 March 2019 22:05 CET | Update | - |
| article html file updated | 14 March 2018 15:05 CET | Update | - |
| article html file updated | 9 February 2018 09:40 CET | Original file | - |
| article xml uploaded. | 9 February 2018 09:38 CET | Original file | https://www.mdpi.com/2075-163X/8/2/57/xml |
| article pdf uploaded. | 9 February 2018 09:38 CET | Version of Record | https://www.mdpi.com/2075-163X/8/2/57/pdf |
