| article html file updated | 8 February 2020 04:03 CET | Update | https://www.mdpi.com/1422-0067/18/4/878 |
| article html file updated | 4 May 2019 01:19 CEST | Update | - |
| article html file updated | 2 May 2017 06:18 CEST | Update | - |
| article html file updated | 20 April 2017 15:32 CEST | Original file | - |
| article xml uploaded. | 20 April 2017 15:30 CEST | Original file | https://www.mdpi.com/1422-0067/18/4/878/xml |
| article pdf uploaded. | 20 April 2017 15:30 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/878/pdf |
