| article html file updated | 6 February 2020 15:21 CET | Update | https://www.mdpi.com/2073-4409/4/1/56 |
| article html file updated | 7 May 2019 02:09 CEST | Update | - |
| article html file updated | 25 March 2019 20:47 CET | Update | - |
| article html file updated | 9 November 2017 11:44 CET | Update | - |
| article html file updated | 21 August 2015 06:12 CEST | Update | - |
| article html file updated | 1 April 2015 11:10 CEST | Original file | - |
| article xml file uploaded | 1 April 2015 11:10 CEST | Original file | https://www.mdpi.com/2073-4409/4/1/56/xml |
| article pdf uploaded. | 20 January 2015 15:54 CET | Version of Record | https://www.mdpi.com/2073-4409/4/1/56/pdf |
