| article html file updated | 8 February 2020 03:12 CET | Update | https://www.mdpi.com/1996-1073/10/4/502 |
| article html file updated | 24 September 2019 05:38 CEST | Update | - |
| article html file updated | 4 May 2019 02:58 CEST | Update | - |
| article html file updated | 28 April 2017 06:11 CEST | Update | - |
| article html file updated | 9 April 2017 09:33 CEST | Original file | - |
| article xml uploaded. | 9 April 2017 09:32 CEST | Update | https://www.mdpi.com/1996-1073/10/4/502/xml |
| article pdf uploaded. | 9 April 2017 09:32 CEST | Version of Record | https://www.mdpi.com/1996-1073/10/4/502/pdf |
