| article html file updated | 6 February 2020 02:34 CET | Update | https://www.mdpi.com/1660-3397/11/6/1977 |
| article html file updated | 8 May 2019 04:11 CEST | Update | - |
| article html file updated | 20 March 2019 23:38 CET | Update | - |
| article html file updated | 17 June 2015 10:08 CEST | Update | - |
| article html file updated | 6 August 2013 15:52 CEST | Original file | - |
| article xml file uploaded | 6 August 2013 15:52 CEST | Original file | https://www.mdpi.com/1660-3397/11/6/1977/xml |
| article pdf uploaded. | 10 June 2013 09:47 CEST | Version of Record | https://www.mdpi.com/1660-3397/11/6/1977/pdf |
