| article html file updated | 8 February 2020 02:08 CET | Update | https://www.mdpi.com/1996-1073/10/4/428 |
| article html file updated | 4 May 2019 05:16 CEST | Update | - |
| article html file updated | 28 April 2017 05:55 CEST | Update | - |
| article html file updated | 27 March 2017 05:30 CEST | Update | - |
| article html file updated | 26 March 2017 22:25 CEST | Update | - |
| article html file updated | 25 March 2017 22:25 CET | Update | - |
| article html file updated | 24 March 2017 22:29 CET | Update | - |
| article html file updated | 24 March 2017 09:42 CET | Original file | - |
| article xml uploaded. | 24 March 2017 09:41 CET | Original file | https://www.mdpi.com/1996-1073/10/4/428/xml |
| article pdf uploaded. | 24 March 2017 09:41 CET | Updated version of record | https://www.mdpi.com/1996-1073/10/4/428/pdf |
| article pdf uploaded. | 23 March 2017 15:31 CET | Version of Record | https://www.mdpi.com/1996-1073/10/4/428/pdf-vor |
