| article html file updated | 8 February 2020 21:06 CET | Update | https://www.mdpi.com/2227-7080/5/4/72 |
| article html file updated | 28 September 2019 11:01 CEST | Update | - |
| article html file updated | 2 May 2019 15:10 CEST | Update | - |
| article html file updated | 2 January 2018 11:13 CET | Update | - |
| article html file updated | 14 November 2017 09:55 CET | Original file | - |
| article xml uploaded. | 14 November 2017 09:53 CET | Update | https://www.mdpi.com/2227-7080/5/4/72/xml |
| article xml uploaded. | 14 November 2017 09:53 CET | Original file | - |
| article pdf uploaded. | 14 November 2017 09:53 CET | Version of Record | https://www.mdpi.com/2227-7080/5/4/72/pdf |
