| article html file updated | 9 February 2020 05:15 CET | Update | https://www.mdpi.com/2073-4344/8/2/56 |
| article html file updated | 30 September 2019 10:59 CEST | Update | - |
| article html file updated | 1 May 2019 21:35 CEST | Update | - |
| article html file updated | 17 April 2019 20:25 CEST | Update | - |
| article html file updated | 28 March 2019 20:20 CET | Update | - |
| article html file updated | 14 March 2018 08:42 CET | Update | - |
| article html file updated | 2 February 2018 05:26 CET | Original file | - |
| article xml uploaded. | 2 February 2018 05:25 CET | Update | https://www.mdpi.com/2073-4344/8/2/56/xml |
| article xml uploaded. | 2 February 2018 05:25 CET | Update | - |
| article xml uploaded. | 2 February 2018 05:25 CET | Original file | - |
| article pdf uploaded. | 2 February 2018 05:25 CET | Version of Record | https://www.mdpi.com/2073-4344/8/2/56/pdf |
