| article html file updated | 7 February 2020 03:54 CET | Update | https://www.mdpi.com/2073-4360/8/2/31 |
| article html file updated | 21 September 2019 10:21 CEST | Update | - |
| article html file updated | 6 May 2019 01:42 CEST | Update | - |
| article html file updated | 26 March 2019 19:22 CET | Update | - |
| article html file updated | 15 March 2019 11:41 CET | Original file | - |
| article pdf uploaded. | 26 January 2016 10:33 CET | Version of Record | https://www.mdpi.com/2073-4360/8/2/31/pdf |
| article xml uploaded. | 26 January 2016 10:33 CET | Original file | https://www.mdpi.com/2073-4360/8/2/31/xml |
