| article html file updated | 7 February 2020 20:45 CET | Update | https://www.mdpi.com/1422-0067/18/1/89 |
| article html file updated | 22 September 2019 17:40 CEST | Update | - |
| article html file updated | 4 May 2019 16:52 CEST | Update | - |
| article html file updated | 8 February 2017 10:54 CET | Update | - |
| article html file updated | 4 January 2017 09:22 CET | Original file | - |
| article xml uploaded. | 4 January 2017 09:20 CET | Update | https://www.mdpi.com/1422-0067/18/1/89/xml |
| article pdf uploaded. | 4 January 2017 09:20 CET | Version of Record | https://www.mdpi.com/1422-0067/18/1/89/pdf |
