| article html file updated | 8 February 2020 19:34 CET | Update | https://www.mdpi.com/2075-4418/7/4/57 |
| article html file updated | 28 September 2019 00:59 CEST | Update | - |
| article html file updated | 2 May 2019 18:44 CEST | Update | - |
| article html file updated | 2 January 2018 15:30 CET | Update | - |
| article html file updated | 26 October 2017 15:14 CEST | Original file | - |
| article xml uploaded. | 26 October 2017 15:13 CEST | Original file | https://www.mdpi.com/2075-4418/7/4/57/xml |
| article pdf uploaded. | 26 October 2017 15:13 CEST | Version of Record | https://www.mdpi.com/2075-4418/7/4/57/pdf |
