| article html file updated | 8 February 2020 04:04 CET | Update | https://www.mdpi.com/1422-0067/18/4/881 |
| article html file updated | 24 September 2019 10:35 CEST | Update | - |
| article html file updated | 4 May 2019 01:18 CEST | Update | - |
| article html file updated | 2 May 2017 06:18 CEST | Update | - |
| article html file updated | 21 April 2017 10:18 CEST | Original file | - |
| article xml uploaded. | 21 April 2017 10:17 CEST | Original file | https://www.mdpi.com/1422-0067/18/4/881/xml |
| article pdf uploaded. | 21 April 2017 10:17 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/881/pdf |
