| article html file updated | 7 February 2020 11:18 CET | Update | https://www.mdpi.com/2075-163X/6/3/68 |
| article html file updated | 5 May 2019 10:52 CEST | Update | - |
| article html file updated | 27 March 2019 09:32 CET | Update | - |
| article html file updated | 28 September 2016 07:37 CEST | Update | - |
| article html file updated | 7 July 2016 08:40 CEST | Original file | - |
| article xml uploaded. | 7 July 2016 08:39 CEST | Original file | https://www.mdpi.com/2075-163X/6/3/68/xml |
| article pdf uploaded. | 7 July 2016 08:39 CEST | Version of Record | https://www.mdpi.com/2075-163X/6/3/68/pdf |
