| article html file updated | 7 February 2020 05:16 CET | Update | https://www.mdpi.com/2073-4360/8/3/68 |
| article html file updated | 21 September 2019 12:18 CEST | Update | - |
| article html file updated | 5 May 2019 22:48 CEST | Update | - |
| article html file updated | 26 March 2019 22:12 CET | Update | - |
| article html file updated | 15 March 2019 11:50 CET | Update | - |
| article html file updated | 30 March 2016 07:55 CEST | Original file | - |
| article pdf uploaded. | 1 March 2016 09:55 CET | Version of Record | https://www.mdpi.com/2073-4360/8/3/68/pdf |
| article xml uploaded. | 1 March 2016 09:55 CET | Original file | https://www.mdpi.com/2073-4360/8/3/68/xml |
