| article html file updated | 7 February 2020 12:01 CET | Update | https://www.mdpi.com/2297-8747/21/3/32 |
| article html file updated | 5 May 2019 09:34 CEST | Update | - |
| article html file updated | 27 March 2019 10:53 CET | Update | - |
| article html file updated | 20 July 2016 14:53 CEST | Original file | - |
| article xml uploaded. | 20 July 2016 14:52 CEST | Original file | https://www.mdpi.com/2297-8747/21/3/32/xml |
| article pdf uploaded. | 20 July 2016 14:52 CEST | Version of Record | https://www.mdpi.com/2297-8747/21/3/32/pdf |
