| article html file updated | 7 February 2020 04:01 CET | Update | https://www.mdpi.com/2073-4425/7/2/8 |
| article html file updated | 6 May 2019 01:27 CEST | Update | N/A |
| article html file updated | 26 March 2019 19:37 CET | Original file | N/A |
| article pdf uploaded. | 28 January 2016 12:18 CET | Version of Record | https://www.mdpi.com/2073-4425/7/2/8/pdf |
| article xml uploaded. | 28 January 2016 12:18 CET | Original file | https://www.mdpi.com/2073-4425/7/2/8/xml |
