| article html file updated | 7 February 2020 23:15 CET | Update | https://www.mdpi.com/2073-4344/7/2/57 |
| article html file updated | 4 May 2019 11:32 CEST | Update | - |
| article html file updated | 1 March 2017 07:53 CET | Update | - |
| article html file updated | 23 February 2017 10:02 CET | Original file | - |
| article xml uploaded. | 23 February 2017 10:01 CET | Update | https://www.mdpi.com/2073-4344/7/2/57/xml |
| article xml uploaded. | 23 February 2017 10:01 CET | Original file | - |
| article pdf uploaded. | 23 February 2017 10:01 CET | Updated version of record | https://www.mdpi.com/2073-4344/7/2/57/pdf |
| article pdf uploaded. | 13 February 2017 10:09 CET | Version of Record | https://www.mdpi.com/2073-4344/7/2/57/pdf-vor |
