| article html file updated | 7 February 2020 11:23 CET | Update | https://www.mdpi.com/2075-163X/6/3/69 |
| article html file updated | 5 May 2019 10:43 CEST | Update | - |
| article html file updated | 27 March 2019 09:42 CET | Update | - |
| article html file updated | 28 September 2016 07:37 CEST | Update | - |
| article html file updated | 8 July 2016 10:29 CEST | Original file | - |
| article xml uploaded. | 8 July 2016 10:28 CEST | Original file | https://www.mdpi.com/2075-163X/6/3/69/xml |
| article pdf uploaded. | 8 July 2016 10:28 CEST | Version of Record | https://www.mdpi.com/2075-163X/6/3/69/pdf |
