| article html file updated | 7 February 2020 21:12 CET | Update | https://www.mdpi.com/2225-1146/5/1/7 |
| article html file updated | 4 May 2019 15:53 CEST | Update | - |
| article html file updated | 14 March 2018 09:56 CET | Update | - |
| article html file updated | 11 January 2017 11:26 CET | Original file | - |
| article xml uploaded. | 11 January 2017 11:25 CET | Original file | https://www.mdpi.com/2225-1146/5/1/7/xml |
| article pdf uploaded. | 11 January 2017 11:25 CET | Version of Record | https://www.mdpi.com/2225-1146/5/1/7/pdf |
