| article html file updated | 7 February 2020 05:31 CET | Update | https://www.mdpi.com/2225-1146/4/1/18 |
| article html file updated | 5 May 2019 22:16 CEST | Update | - |
| article html file updated | 26 March 2019 22:44 CET | Update | - |
| article html file updated | 14 March 2018 10:04 CET | Original file | - |
| article pdf uploaded. | 7 March 2016 14:26 CET | Version of Record | https://www.mdpi.com/2225-1146/4/1/18/pdf |
| article xml uploaded. | 7 March 2016 14:26 CET | Original file | https://www.mdpi.com/2225-1146/4/1/18/xml |
