| article html file updated | 6 February 2020 22:42 CET | Update | https://www.mdpi.com/2304-8158/4/3/420 |
| article html file updated | 6 May 2019 11:32 CEST | Update | - |
| article html file updated | 26 March 2019 10:34 CET | Update | - |
| article html file updated | 14 October 2015 09:49 CEST | Update | - |
| article xml file uploaded | 14 October 2015 09:49 CEST | Update | https://www.mdpi.com/2304-8158/4/3/420/xml |
| article html file updated | 24 September 2015 11:58 CEST | Original file | - |
| article xml file uploaded | 24 September 2015 11:58 CEST | Original file | - |
| article pdf uploaded. | 11 September 2015 15:17 CEST | Version of Record | https://www.mdpi.com/2304-8158/4/3/420/pdf |
