| article html file updated | 6 February 2020 00:28 CET | Update | https://www.mdpi.com/2075-5309/3/1/173 |
| article html file updated | 8 May 2019 08:39 CEST | Update | - |
| article html file updated | 20 March 2019 18:25 CET | Update | - |
| article html file updated | 17 June 2015 06:19 CEST | Update | - |
| article html file updated | 24 June 2014 12:03 CEST | Original file | - |
| article xml file uploaded | 24 June 2014 12:03 CEST | Original file | https://www.mdpi.com/2075-5309/3/1/173/xml |
| article pdf uploaded. | 18 February 2013 12:46 CET | Updated version of record | https://www.mdpi.com/2075-5309/3/1/173/pdf |
| article pdf uploaded. | 6 February 2013 15:53 CET | Version of Record | https://www.mdpi.com/2075-5309/3/1/173/pdf-vor |
