| article html file updated | 8 February 2020 02:58 CET | Update | https://www.mdpi.com/1422-0067/18/4/768 |
| article html file updated | 24 September 2019 04:21 CEST | Update | - |
| article html file updated | 4 May 2019 03:26 CEST | Update | - |
| article html file updated | 2 May 2017 05:58 CEST | Update | - |
| article html file updated | 5 April 2017 12:52 CEST | Original file | - |
| article xml uploaded. | 5 April 2017 12:51 CEST | Original file | https://www.mdpi.com/1422-0067/18/4/768/xml |
| article pdf uploaded. | 5 April 2017 12:51 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/768/pdf |
