| article html file updated | 7 February 2020 21:08 CET | Update | https://www.mdpi.com/2076-0787/6/1/1 |
| article html file updated | 4 May 2019 16:03 CEST | Update | N/A |
| article pdf uploaded. | 11 January 2017 02:43 CET | Version of Record | https://www.mdpi.com/2076-0787/6/1/1/pdf |
| article html file updated | 10 January 2017 15:31 CET | Original file | N/A |
| article xml uploaded. | 10 January 2017 15:30 CET | Original file | https://www.mdpi.com/2076-0787/6/1/1/xml |
