| article html file updated | 7 February 2020 20:49 CET | Update | https://www.mdpi.com/2073-4425/8/1/15 |
| article html file updated | 22 September 2019 18:07 CEST | Update | - |
| article html file updated | 4 May 2019 16:42 CEST | Update | - |
| article html file updated | 7 February 2017 12:18 CET | Update | - |
| article pdf uploaded. | 10 January 2017 16:00 CET | Updated version of record | https://www.mdpi.com/2073-4425/8/1/15/pdf |
| article html file updated | 5 January 2017 09:24 CET | Original file | - |
| article xml uploaded. | 5 January 2017 09:23 CET | Original file | https://www.mdpi.com/2073-4425/8/1/15/xml |
