| article html file updated | 8 February 2020 02:43 CET | Update | https://www.mdpi.com/1996-1073/10/4/442 |
| article html file updated | 24 September 2019 02:57 CEST | Update | - |
| article html file updated | 4 May 2019 03:59 CEST | Update | - |
| article html file updated | 28 April 2017 05:58 CEST | Update | - |
| article html file updated | 1 April 2017 05:47 CEST | Original file | - |
| article xml uploaded. | 1 April 2017 05:46 CEST | Original file | https://www.mdpi.com/1996-1073/10/4/442/xml |
| article pdf uploaded. | 1 April 2017 05:46 CEST | Version of Record | https://www.mdpi.com/1996-1073/10/4/442/pdf |
