| article html file updated | 8 February 2020 02:22 CET | Update | https://www.mdpi.com/1996-1073/10/4/431 |
| article html file updated | 24 September 2019 00:54 CEST | Update | - |
| article html file updated | 4 May 2019 04:47 CEST | Update | - |
| article html file updated | 28 April 2017 05:56 CEST | Update | - |
| article html file updated | 28 March 2017 04:03 CEST | Original file | - |
| article xml uploaded. | 28 March 2017 03:55 CEST | Original file | https://www.mdpi.com/1996-1073/10/4/431/xml |
| article pdf uploaded. | 28 March 2017 03:55 CEST | Version of Record | https://www.mdpi.com/1996-1073/10/4/431/pdf |
