| article html file updated | 8 February 2020 04:02 CET | Update | https://www.mdpi.com/1422-0067/18/4/877 |
| article html file updated | 4 May 2019 01:22 CEST | Update | - |
| article html file updated | 2 May 2017 06:18 CEST | Update | - |
| article html file updated | 20 April 2017 14:13 CEST | Original file | - |
| article xml uploaded. | 20 April 2017 14:12 CEST | Original file | https://www.mdpi.com/1422-0067/18/4/877/xml |
| article pdf uploaded. | 20 April 2017 14:12 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/877/pdf |
