| article html file updated | 8 February 2020 03:44 CET | Update | https://www.mdpi.com/2297-8739/4/2/15 |
| article html file updated | 24 September 2019 08:36 CEST | Update | - |
| article html file updated | 4 May 2019 01:56 CEST | Update | - |
| article html file updated | 30 June 2017 09:14 CEST | Update | - |
| article html file updated | 17 April 2017 11:49 CEST | Original file | - |
| article xml uploaded. | 17 April 2017 11:47 CEST | Original file | https://www.mdpi.com/2297-8739/4/2/15/xml |
| article pdf uploaded. | 17 April 2017 11:47 CEST | Version of Record | https://www.mdpi.com/2297-8739/4/2/15/pdf |
