| article html file updated | 7 February 2020 23:01 CET | Update | https://www.mdpi.com/2071-1050/9/2/237 |
| article html file updated | 23 September 2019 05:58 CEST | Update | - |
| article html file updated | 4 May 2019 11:58 CEST | Update | - |
| article html file updated | 1 March 2017 10:33 CET | Update | - |
| article html file updated | 15 February 2017 02:20 CET | Original file | - |
| article xml uploaded. | 15 February 2017 02:18 CET | Original file | https://www.mdpi.com/2071-1050/9/2/237/xml |
| article pdf uploaded. | 15 February 2017 02:18 CET | Updated version of record | https://www.mdpi.com/2071-1050/9/2/237/pdf |
| article pdf uploaded. | 10 February 2017 05:04 CET | Version of Record | https://www.mdpi.com/2071-1050/9/2/237/pdf-vor |
