| article html file updated | 8 February 2020 02:46 CET | Update | https://www.mdpi.com/1422-0067/18/4/751 |
| article html file updated | 24 September 2019 03:15 CEST | Update | N/A |
| article html file updated | 4 May 2019 03:52 CEST | Update | N/A |
| article html file updated | 2 May 2017 05:55 CEST | Update | N/A |
| article html file updated | 1 April 2017 12:28 CEST | Original file | N/A |
| article xml uploaded. | 1 April 2017 12:26 CEST | Original file | https://www.mdpi.com/1422-0067/18/4/751/xml |
| article pdf uploaded. | 1 April 2017 12:26 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/751/pdf |
