| article html file updated | 6 February 2020 14:29 CET | Update | https://www.mdpi.com/2076-0817/3/4/934 |
| article html file updated | 7 May 2019 03:55 CEST | Update | - |
| article html file updated | 25 March 2019 19:19 CET | Update | - |
| article html file updated | 21 August 2015 04:12 CEST | Update | - |
| article html file updated | 4 January 2015 10:35 CET | Original file | - |
| article xml file uploaded | 4 January 2015 10:35 CET | Original file | https://www.mdpi.com/2076-0817/3/4/934/xml |
| article pdf uploaded. | 15 December 2014 13:34 CET | Version of Record | https://www.mdpi.com/2076-0817/3/4/934/pdf |
