| article html file updated | 7 February 2020 02:35 CET | Update | https://www.mdpi.com/1660-3397/14/1/2 |
| article html file updated | 6 May 2019 04:13 CEST | Update | N/A |
| article html file updated | 26 March 2019 17:04 CET | Original file | N/A |
| article pdf uploaded. | 23 December 2015 14:54 CET | Version of Record | https://www.mdpi.com/1660-3397/14/1/2/pdf |
| article xml uploaded. | 23 December 2015 14:54 CET | Original file | https://www.mdpi.com/1660-3397/14/1/2/xml |
