| article html file updated | 8 February 2020 02:55 CET | Update | https://www.mdpi.com/2297-8739/4/2/13 |
| article html file updated | 24 September 2019 04:05 CEST | Update | - |
| article html file updated | 4 May 2019 03:33 CEST | Update | - |
| article html file updated | 30 June 2017 09:13 CEST | Update | - |
| article html file updated | 5 April 2017 10:52 CEST | Original file | - |
| article xml uploaded. | 5 April 2017 10:51 CEST | Original file | https://www.mdpi.com/2297-8739/4/2/13/xml |
| article pdf uploaded. | 5 April 2017 10:51 CEST | Version of Record | https://www.mdpi.com/2297-8739/4/2/13/pdf |
