| article html file updated | 6 February 2020 17:29 CET | Update | https://www.mdpi.com/2075-4701/5/2/578 | 
| article html file updated | 6 May 2019 22:17 CEST | Update | - | 
| article html file updated | 26 March 2019 00:22 CET | Update | - | 
| article html file updated | 21 August 2015 10:14 CEST | Update | - | 
| article html file updated | 30 June 2015 03:11 CEST | Original file | - | 
| article xml file uploaded | 30 June 2015 03:11 CEST | Original file | https://www.mdpi.com/2075-4701/5/2/578/xml | 
| article pdf uploaded. | 10 April 2015 10:57 CEST | Updated version of record | https://www.mdpi.com/2075-4701/5/2/578/pdf | 
| article pdf uploaded. | 10 April 2015 09:47 CEST | Version of Record | https://www.mdpi.com/2075-4701/5/2/578/pdf-vor |