| article html file updated | 6 February 2020 15:09 CET | Update | https://www.mdpi.com/2079-4983/6/1/16 | 
| article html file updated | 20 September 2019 16:53 CEST | Update | - | 
| article html file updated | 7 May 2019 02:32 CEST | Update | - | 
| article html file updated | 25 March 2019 20:27 CET | Update | - | 
| article html file updated | 11 December 2018 09:31 CET | Update | - | 
| article html file updated | 11 December 2018 09:22 CET | Update | - | 
| article html file updated | 11 December 2018 09:18 CET | Update | - | 
| article html file updated | 11 December 2018 09:11 CET | Update | - | 
| article html file updated | 11 December 2018 09:11 CET | Update | - | 
| article html file updated | 11 December 2018 09:07 CET | Update | - | 
| article html file updated | 11 December 2018 08:17 CET | Update | - | 
| article html file updated | 21 August 2015 05:43 CEST | Update | - | 
| article html file updated | 3 April 2015 12:06 CEST | Original file | - | 
| article xml file uploaded | 3 April 2015 12:06 CEST | Original file | https://www.mdpi.com/2079-4983/6/1/16/xml | 
| article pdf uploaded. | 13 January 2015 15:32 CET | Version of Record | https://www.mdpi.com/2079-4983/6/1/16/pdf |