| article html file updated | 7 February 2020 03:03 CET | Update | https://www.mdpi.com/2297-8739/3/1/2 |
| article html file updated | 6 May 2019 03:18 CEST | Update | - |
| article html file updated | 26 March 2019 17:46 CET | Update | - |
| article html file updated | 19 April 2016 11:55 CEST | Original file | - |
| article pdf uploaded. | 22 March 2016 13:29 CET | Updated version of record | https://www.mdpi.com/2297-8739/3/1/2/pdf |
| article pdf uploaded. | 6 January 2016 11:58 CET | Updated version of record | https://www.mdpi.com/2297-8739/3/1/2/pdf-vor |
| article xml uploaded. | 6 January 2016 11:58 CET | Update | https://www.mdpi.com/2297-8739/3/1/2/xml |
| article pdf uploaded. | 5 January 2016 16:16 CET | Version of Record | https://www.mdpi.com/2297-8739/3/1/2/pdf-vor |
