| article html file updated | 8 February 2020 20:55 CET | Update | https://www.mdpi.com/2076-0787/6/4/88 |
| article html file updated | 2 May 2019 15:35 CEST | Update | N/A |
| article html file updated | 11 November 2017 08:01 CET | Original file | N/A |
| article xml uploaded. | 11 November 2017 08:00 CET | Original file | https://www.mdpi.com/2076-0787/6/4/88/xml |
| article pdf uploaded. | 11 November 2017 08:00 CET | Version of Record | https://www.mdpi.com/2076-0787/6/4/88/pdf |
