| article html file updated | 8 February 2020 02:42 CET | Update | https://www.mdpi.com/2071-1050/9/4/540 |
| article html file updated | 24 September 2019 02:52 CEST | Update | N/A |
| article html file updated | 4 May 2019 04:02 CEST | Update | N/A |
| article html file updated | 28 April 2017 10:53 CEST | Update | N/A |
| article html file updated | 5 April 2017 11:35 CEST | Original file | N/A |
| article xml uploaded. | 5 April 2017 11:34 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/540/xml |
| article pdf uploaded. | 5 April 2017 11:34 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/4/540/pdf |
| article pdf uploaded. | 31 March 2017 13:26 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/540/pdf-vor |
