| article html file updated | 8 February 2020 02:44 CET | Update | https://www.mdpi.com/1999-4915/9/4/66 |
| article html file updated | 24 September 2019 03:04 CEST | Update | - |
| article html file updated | 4 May 2019 03:57 CEST | Update | - |
| article html file updated | 29 April 2017 05:51 CEST | Update | - |
| article html file updated | 1 April 2017 09:14 CEST | Original file | - |
| article xml uploaded. | 1 April 2017 09:13 CEST | Original file | https://www.mdpi.com/1999-4915/9/4/66/xml |
| article pdf uploaded. | 1 April 2017 09:13 CEST | Version of Record | https://www.mdpi.com/1999-4915/9/4/66/pdf |
