| article html file updated | 7 February 2020 05:58 CET | Update | https://www.mdpi.com/2071-1050/8/3/272 |
| article html file updated | 5 May 2019 21:19 CEST | Update | - |
| article html file updated | 26 March 2019 23:35 CET | Update | - |
| article html file updated | 31 March 2016 08:44 CEST | Original file | - |
| article xml uploaded. | 16 March 2016 09:40 CET | Original file | https://www.mdpi.com/2071-1050/8/3/272/xml |
| article pdf uploaded. | 16 March 2016 09:40 CET | Version of Record | https://www.mdpi.com/2071-1050/8/3/272/pdf |
