| article html file updated | 7 February 2020 04:10 CET | Update | https://www.mdpi.com/2073-4360/8/2/39 |
| article html file updated | 21 September 2019 10:49 CEST | Update | - |
| article html file updated | 6 May 2019 01:11 CEST | Update | - |
| article html file updated | 26 March 2019 19:53 CET | Update | - |
| article html file updated | 15 March 2019 11:45 CET | Original file | - |
| article pdf uploaded. | 2 February 2016 08:47 CET | Version of Record | https://www.mdpi.com/2073-4360/8/2/39/pdf |
| article xml uploaded. | 2 February 2016 08:47 CET | Original file | https://www.mdpi.com/2073-4360/8/2/39/xml |
