| article html file updated | 6 February 2020 12:28 CET | Update | https://www.mdpi.com/2073-4360/6/9/2451 |
| article html file updated | 7 May 2019 07:50 CEST | Update | N/A |
| article html file updated | 22 March 2019 01:32 CET | Update | N/A |
| article html file updated | 20 August 2015 20:56 CEST | Update | N/A |
| article html file updated | 29 September 2014 08:55 CEST | Original file | N/A |
| article xml file uploaded | 29 September 2014 08:55 CEST | Original file | https://www.mdpi.com/2073-4360/6/9/2451/xml |
| article pdf uploaded. | 25 September 2014 13:53 CEST | Version of Record | https://www.mdpi.com/2073-4360/6/9/2451/pdf |
