| article html file updated | 8 February 2020 20:58 CET | Update | https://www.mdpi.com/2077-0375/7/4/64 |
| article html file updated | 28 September 2019 10:03 CEST | Update | - |
| article html file updated | 2 May 2019 15:30 CEST | Update | - |
| article html file updated | 2 January 2018 20:22 CET | Update | - |
| article html file updated | 12 November 2017 07:11 CET | Original file | - |
| article xml uploaded. | 12 November 2017 07:10 CET | Update | https://www.mdpi.com/2077-0375/7/4/64/xml |
| article xml uploaded. | 12 November 2017 07:10 CET | Update | - |
| article xml uploaded. | 12 November 2017 07:10 CET | Original file | - |
| article pdf uploaded. | 12 November 2017 07:10 CET | Version of Record | https://www.mdpi.com/2077-0375/7/4/64/pdf |
