| article html file updated | 7 February 2020 03:12 CET | Update | https://www.mdpi.com/2071-1050/8/1/56 |
| article html file updated | 6 May 2019 03:00 CEST | Update | N/A |
| article html file updated | 26 March 2019 18:00 CET | Original file | N/A |
| article pdf uploaded. | 13 January 2016 14:27 CET | Updated version of record | https://www.mdpi.com/2071-1050/8/1/56/pdf |
| article xml uploaded. | 13 January 2016 14:27 CET | Update | https://www.mdpi.com/2071-1050/8/1/56/xml |
| article pdf uploaded. | 8 January 2016 13:41 CET | Version of Record | https://www.mdpi.com/2071-1050/8/1/56/pdf-vor |
