| article html file updated | 8 February 2020 04:00 CET | Update | https://www.mdpi.com/1422-0067/18/4/873 |
| article html file updated | 4 May 2019 01:25 CEST | Update | - |
| article html file updated | 2 May 2017 06:17 CEST | Update | - |
| article html file updated | 20 April 2017 14:29 CEST | Original file | - |
| article xml uploaded. | 20 April 2017 14:27 CEST | Original file | https://www.mdpi.com/1422-0067/18/4/873/xml |
| article pdf uploaded. | 20 April 2017 14:27 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/873/pdf |
