| article html file updated | 9 February 2020 12:57 CET | Update | https://www.mdpi.com/2227-7390/6/4/56 |
| article html file updated | 1 May 2019 05:12 CEST | Update | - |
| article html file updated | 17 April 2019 05:25 CEST | Update | - |
| article html file updated | 29 March 2019 13:41 CET | Update | - |
| article html file updated | 1 May 2018 05:22 CEST | Update | - |
| article html file updated | 11 April 2018 10:21 CEST | Original file | - |
| article xml uploaded. | 11 April 2018 10:20 CEST | Original file | https://www.mdpi.com/2227-7390/6/4/56/xml |
| article pdf uploaded. | 11 April 2018 10:20 CEST | Updated version of record | https://www.mdpi.com/2227-7390/6/4/56/pdf |
| article pdf uploaded. | 8 April 2018 13:29 CEST | Updated version of record | https://www.mdpi.com/2227-7390/6/4/56/pdf-vor |
| article pdf uploaded. | 8 April 2018 13:27 CEST | Version of Record | https://www.mdpi.com/2227-7390/6/4/56/pdf-vor |
