| article html file updated | 7 February 2020 13:04 CET | Update | https://www.mdpi.com/2297-8747/21/3/33 |
| article html file updated | 5 May 2019 07:35 CEST | Update | - |
| article html file updated | 27 March 2019 13:08 CET | Update | - |
| article html file updated | 11 August 2016 11:53 CEST | Update | - |
| article html file updated | 9 August 2016 13:59 CEST | Original file | - |
| article xml uploaded. | 9 August 2016 13:58 CEST | Original file | https://www.mdpi.com/2297-8747/21/3/33/xml |
| article pdf uploaded. | 9 August 2016 13:58 CEST | Version of Record | https://www.mdpi.com/2297-8747/21/3/33/pdf |
