| article html file updated | 7 February 2020 17:20 CET | Update | https://www.mdpi.com/2312-7481/2/4/39 |
| article html file updated | 4 May 2019 23:48 CEST | Update | N/A |
| article html file updated | 28 December 2016 11:29 CET | Update | N/A |
| article html file updated | 1 November 2016 10:48 CET | Original file | N/A |
| article xml uploaded. | 1 November 2016 10:47 CET | Original file | https://www.mdpi.com/2312-7481/2/4/39/xml |
| article pdf uploaded. | 1 November 2016 10:47 CET | Version of Record | https://www.mdpi.com/2312-7481/2/4/39/pdf |
