| article html file updated | 6 February 2020 15:31 CET | Update | https://www.mdpi.com/2076-0817/4/1/34 |
| article html file updated | 20 September 2019 17:25 CEST | Update | - |
| article html file updated | 7 May 2019 01:49 CEST | Update | - |
| article html file updated | 25 March 2019 21:03 CET | Update | - |
| article html file updated | 8 September 2015 06:05 CEST | Update | - |
| article xml file uploaded | 8 September 2015 06:05 CEST | Update | https://www.mdpi.com/2076-0817/4/1/34/xml |
| article html file updated | 21 August 2015 06:37 CEST | Update | - |
| article html file updated | 3 April 2015 12:51 CEST | Original file | - |
| article xml file uploaded | 3 April 2015 12:51 CEST | Original file | - |
| article pdf uploaded. | 27 January 2015 14:03 CET | Version of Record | https://www.mdpi.com/2076-0817/4/1/34/pdf |
