| article html file updated | 8 February 2020 02:26 CET | Update | https://www.mdpi.com/2071-1050/9/4/512 |
| article html file updated | 24 September 2019 01:16 CEST | Update | - |
| article html file updated | 4 May 2019 04:38 CEST | Update | - |
| article html file updated | 28 April 2017 10:47 CEST | Update | - |
| article html file updated | 30 March 2017 12:47 CEST | Original file | - |
| article xml uploaded. | 30 March 2017 12:46 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/512/xml |
| article pdf uploaded. | 30 March 2017 12:46 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/4/512/pdf |
| article pdf uploaded. | 28 March 2017 14:48 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/512/pdf-vor |
