| article html file updated | 7 February 2020 04:00 CET | Update | https://www.mdpi.com/2071-1050/8/2/121 |
| article html file updated | 21 September 2019 10:32 CEST | Update | - |
| article html file updated | 6 May 2019 01:29 CEST | Update | - |
| article html file updated | 26 March 2019 19:35 CET | Original file | - |
| article pdf uploaded. | 28 January 2016 10:49 CET | Version of Record | https://www.mdpi.com/2071-1050/8/2/121/pdf |
| article xml uploaded. | 28 January 2016 10:49 CET | Original file | https://www.mdpi.com/2071-1050/8/2/121/xml |
