| article html file updated | 7 February 2020 17:40 CET | Update | https://www.mdpi.com/2313-433X/2/4/32 |
| article html file updated | 4 May 2019 23:11 CEST | Update | - |
| article html file updated | 8 November 2016 11:54 CET | Original file | - |
| article xml uploaded. | 8 November 2016 11:52 CET | Update | https://www.mdpi.com/2313-433X/2/4/32/xml |
| article xml uploaded. | 8 November 2016 11:52 CET | Update | - |
| article xml uploaded. | 8 November 2016 11:52 CET | Update | - |
| article xml uploaded. | 8 November 2016 11:52 CET | Original file | - |
| article pdf uploaded. | 8 November 2016 11:52 CET | Version of Record | https://www.mdpi.com/2313-433X/2/4/32/pdf |
