| article html file updated | 6 February 2020 15:18 CET | Update | https://www.mdpi.com/1999-4893/8/1/3 |
| article html file updated | 7 May 2019 02:14 CEST | Update | - |
| article html file updated | 25 March 2019 20:43 CET | Update | - |
| article html file updated | 21 August 2015 06:08 CEST | Update | - |
| article html file updated | 6 May 2015 05:17 CEST | Original file | - |
| article xml file uploaded | 6 May 2015 05:17 CEST | Original file | https://www.mdpi.com/1999-4893/8/1/3/xml |
| article pdf uploaded. | 19 January 2015 14:46 CET | Version of Record | https://www.mdpi.com/1999-4893/8/1/3/pdf |
