| article html file updated | 6 February 2020 17:31 CET | Update | https://www.mdpi.com/2078-1547/6/1/42 |
| article html file updated | 6 May 2019 22:14 CEST | Update | - |
| article html file updated | 26 March 2019 00:25 CET | Update | - |
| article html file updated | 21 August 2015 10:16 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/2078-1547/6/1/42/xml |
| article pdf uploaded. | 7 May 2015 10:48 CEST | Updated version of record | https://www.mdpi.com/2078-1547/6/1/42/pdf |
| article pdf uploaded. | 15 April 2015 08:16 CEST | Updated version of record | https://www.mdpi.com/2078-1547/6/1/42/pdf-vor |
| article pdf uploaded. | 10 April 2015 15:09 CEST | Version of Record | https://www.mdpi.com/2078-1547/6/1/42/pdf-vor |
