| article html file updated | 7 February 2020 03:33 CET | Update | https://www.mdpi.com/2075-163X/6/1/4 |
| article html file updated | 6 May 2019 02:22 CEST | Update | - |
| article html file updated | 26 March 2019 18:42 CET | Update | - |
| article html file updated | 29 March 2016 11:42 CEST | Original file | - |
| article pdf uploaded. | 19 January 2016 11:19 CET | Updated version of record | https://www.mdpi.com/2075-163X/6/1/4/pdf |
| article pdf uploaded. | 18 January 2016 12:01 CET | Version of Record | https://www.mdpi.com/2075-163X/6/1/4/pdf-vor |
| article xml uploaded. | 18 January 2016 12:01 CET | Original file | https://www.mdpi.com/2075-163X/6/1/4/xml |
