| article html file updated | 7 February 2020 18:15 CET | Update | https://www.mdpi.com/2312-7481/2/4/41 |
| article html file updated | 4 May 2019 22:04 CEST | Update | - |
| article html file updated | 28 December 2016 11:29 CET | Update | - |
| article html file updated | 18 November 2016 11:24 CET | Original file | - |
| article xml uploaded. | 18 November 2016 11:22 CET | Original file | https://www.mdpi.com/2312-7481/2/4/41/xml |
| article pdf uploaded. | 18 November 2016 11:22 CET | Version of Record | https://www.mdpi.com/2312-7481/2/4/41/pdf |
