| article html file updated | 7 February 2020 22:28 CET | Update | https://www.mdpi.com/1996-1073/10/2/168 |
| article html file updated | 23 September 2019 02:53 CEST | Update | - |
| article html file updated | 4 May 2019 13:07 CEST | Update | - |
| article html file updated | 28 February 2017 10:25 CET | Update | - |
| article html file updated | 13 February 2017 03:56 CET | Original file | - |
| article xml uploaded. | 13 February 2017 03:55 CET | Original file | https://www.mdpi.com/1996-1073/10/2/168/xml |
| article pdf uploaded. | 13 February 2017 03:55 CET | Updated version of record | https://www.mdpi.com/1996-1073/10/2/168/pdf |
| article pdf uploaded. | 29 January 2017 08:55 CET | Version of Record | https://www.mdpi.com/1996-1073/10/2/168/pdf-vor |
