| article html file updated | 6 February 2020 17:20 CET | Update | https://www.mdpi.com/1660-3397/13/4/1993 |
| article html file updated | 6 May 2019 22:33 CEST | Update | - |
| article html file updated | 26 March 2019 00:07 CET | Update | - |
| article html file updated | 21 August 2015 10:00 CEST | Update | - |
| article html file updated | 29 April 2015 11:29 CEST | Original file | - |
| article xml file uploaded | 29 April 2015 11:29 CEST | Original file | https://www.mdpi.com/1660-3397/13/4/1993/xml |
| article pdf uploaded. | 3 April 2015 13:11 CEST | Version of Record | https://www.mdpi.com/1660-3397/13/4/1993/pdf |
