| article html file updated | 7 February 2020 22:54 CET | Update | https://www.mdpi.com/2073-4360/9/2/56 |
| article html file updated | 23 September 2019 05:16 CEST | Update | - |
| article html file updated | 4 May 2019 12:14 CEST | Update | - |
| article html file updated | 20 March 2019 06:36 CET | Update | - |
| article html file updated | 1 March 2017 11:14 CET | Update | - |
| article html file updated | 9 February 2017 10:42 CET | Original file | - |
| article xml uploaded. | 9 February 2017 10:40 CET | Original file | https://www.mdpi.com/2073-4360/9/2/56/xml |
| article pdf uploaded. | 9 February 2017 10:40 CET | Updated version of record | https://www.mdpi.com/2073-4360/9/2/56/pdf |
| article pdf uploaded. | 8 February 2017 12:12 CET | Version of Record | https://www.mdpi.com/2073-4360/9/2/56/pdf-vor |
