| article html file updated | 7 February 2020 04:37 CET | Update | https://www.mdpi.com/2073-4360/8/2/50 |
| article html file updated | 21 September 2019 11:24 CEST | Update | - |
| article html file updated | 6 May 2019 00:13 CEST | Update | - |
| article html file updated | 26 March 2019 20:50 CET | Update | - |
| article html file updated | 15 March 2019 11:54 CET | Original file | - |
| article pdf uploaded. | 16 February 2016 11:21 CET | Version of Record | https://www.mdpi.com/2073-4360/8/2/50/pdf |
| article xml uploaded. | 16 February 2016 11:21 CET | Original file | https://www.mdpi.com/2073-4360/8/2/50/xml |
