| article html file updated | 8 February 2020 02:21 CET | Update | https://www.mdpi.com/2071-1050/9/4/508 |
| article html file updated | 24 September 2019 00:50 CEST | Update | - |
| article html file updated | 4 May 2019 04:48 CEST | Update | - |
| article html file updated | 28 April 2017 10:46 CEST | Update | - |
| article html file updated | 28 March 2017 12:45 CEST | Original file | - |
| article xml uploaded. | 28 March 2017 12:43 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/508/xml |
| article pdf uploaded. | 28 March 2017 12:43 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/4/508/pdf |
| article pdf uploaded. | 27 March 2017 14:27 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/508/pdf-vor |
