| article html file updated | 9 February 2020 13:05 CET | Update | https://www.mdpi.com/2227-7390/6/4/57 |
| article html file updated | 2 October 2019 10:24 CEST | Update | - |
| article html file updated | 1 May 2019 04:55 CEST | Update | - |
| article html file updated | 17 April 2019 05:10 CEST | Update | - |
| article html file updated | 29 March 2019 14:01 CET | Update | - |
| article html file updated | 1 May 2018 05:22 CEST | Update | - |
| article html file updated | 16 April 2018 14:28 CEST | Original file | - |
| article pdf uploaded. | 16 April 2018 14:27 CEST | Updated version of record | https://www.mdpi.com/2227-7390/6/4/57/pdf |
| article xml uploaded. | 16 April 2018 14:27 CEST | Update | https://www.mdpi.com/2227-7390/6/4/57/xml |
| article xml file uploaded | 16 April 2018 14:27 CEST | Original file | - |
