| article html file updated | 8 February 2020 06:59 CET | Update | https://www.mdpi.com/2075-4701/7/6/199 |
| article html file updated | 25 September 2019 01:49 CEST | Update | - |
| article html file updated | 3 May 2019 19:53 CEST | Update | - |
| article html file updated | 28 June 2017 13:59 CEST | Update | - |
| article html file updated | 23 June 2017 05:24 CEST | Original file | - |
| article xml uploaded. | 23 June 2017 05:23 CEST | Update | https://www.mdpi.com/2075-4701/7/6/199/xml |
| article pdf uploaded. | 30 May 2017 11:23 CEST | Version of Record | https://www.mdpi.com/2075-4701/7/6/199/pdf |
