| article html file updated | 8 February 2020 03:07 CET | Update | https://www.mdpi.com/1999-4915/9/4/72 |
| article html file updated | 24 September 2019 05:13 CEST | Update | - |
| article html file updated | 4 May 2019 03:07 CEST | Update | - |
| article html file updated | 29 April 2017 05:52 CEST | Update | - |
| article html file updated | 7 April 2017 12:07 CEST | Original file | - |
| article xml uploaded. | 7 April 2017 12:06 CEST | Original file | https://www.mdpi.com/1999-4915/9/4/72/xml |
| article pdf uploaded. | 7 April 2017 12:06 CEST | Version of Record | https://www.mdpi.com/1999-4915/9/4/72/pdf |
