| article html file updated | 7 February 2020 12:00 CET | Update | https://www.mdpi.com/2223-7747/5/3/31 |
| article html file updated | 5 May 2019 09:36 CEST | Update | - |
| article html file updated | 27 March 2019 10:52 CET | Update | - |
| article html file updated | 28 September 2016 11:49 CEST | Update | - |
| article html file updated | 20 July 2016 14:24 CEST | Original file | - |
| article xml uploaded. | 20 July 2016 14:22 CEST | Original file | https://www.mdpi.com/2223-7747/5/3/31/xml |
| article pdf uploaded. | 20 July 2016 14:22 CEST | Version of Record | https://www.mdpi.com/2223-7747/5/3/31/pdf |
