| article html file updated | 8 February 2020 03:07 CET | Update | https://www.mdpi.com/2079-6412/7/4/51 |
| article html file updated | 24 September 2019 05:10 CEST | Update | - |
| article html file updated | 4 May 2019 03:08 CEST | Update | - |
| article html file updated | 28 April 2017 05:43 CEST | Update | - |
| article html file updated | 7 April 2017 13:12 CEST | Original file | - |
| article xml uploaded. | 7 April 2017 13:11 CEST | Original file | https://www.mdpi.com/2079-6412/7/4/51/xml |
| article pdf uploaded. | 7 April 2017 13:11 CEST | Version of Record | https://www.mdpi.com/2079-6412/7/4/51/pdf |
