| article html file updated | 6 February 2020 15:11 CET | Update | https://www.mdpi.com/2218-1989/5/1/56 |
| article html file updated | 7 May 2019 02:28 CEST | Update | - |
| article html file updated | 25 March 2019 20:30 CET | Update | - |
| article html file updated | 21 August 2015 05:52 CEST | Update | - |
| article html file updated | 2 April 2015 05:24 CEST | Update | - |
| article xml file uploaded | 2 April 2015 05:24 CEST | Update | https://www.mdpi.com/2218-1989/5/1/56/xml |
| article html file updated | 20 January 2015 08:36 CET | Original file | - |
| article xml file uploaded | 20 January 2015 08:36 CET | Original file | - |
| article pdf uploaded. | 15 January 2015 10:30 CET | Updated version of record | https://www.mdpi.com/2218-1989/5/1/56/pdf |
| article pdf uploaded. | 14 January 2015 14:04 CET | Version of Record | https://www.mdpi.com/2218-1989/5/1/56/pdf-vor |
