| article html file updated | 7 February 2020 04:13 CET | Update | https://www.mdpi.com/1660-3397/14/2/31 |
| article html file updated | 6 May 2019 01:05 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:00 CET | Original file | N/A |
| article pdf uploaded. | 3 February 2016 12:14 CET | Version of Record | https://www.mdpi.com/1660-3397/14/2/31/pdf |
| article xml uploaded. | 3 February 2016 12:14 CET | Original file | https://www.mdpi.com/1660-3397/14/2/31/xml |
