| article html file updated | 8 February 2020 01:04 CET | Update | https://www.mdpi.com/2075-1702/5/1/9 |
| article html file updated | 23 September 2019 17:37 CEST | Update | - |
| article html file updated | 4 May 2019 07:34 CEST | Update | - |
| article html file updated | 30 March 2017 05:39 CEST | Update | - |
| article html file updated | 13 March 2017 10:22 CET | Original file | - |
| article xml uploaded. | 13 March 2017 10:21 CET | Original file | https://www.mdpi.com/2075-1702/5/1/9/xml |
| article pdf uploaded. | 13 March 2017 10:21 CET | Updated version of record | https://www.mdpi.com/2075-1702/5/1/9/pdf |
| article pdf uploaded. | 8 March 2017 13:03 CET | Version of Record | https://www.mdpi.com/2075-1702/5/1/9/pdf-vor |
