| article html file updated | 31 August 2025 14:30 CEST | Update | https://www.mdpi.com/1422-0067/21/6/1997 |
| article html file updated | 20 July 2022 22:59 CEST | Update | - |
| article html file updated | 2 April 2020 02:23 CEST | Update | - |
| article html file updated | 15 March 2020 07:06 CET | Original file | - |
| article pdf uploaded. | 15 March 2020 07:05 CET | Version of Record | https://www.mdpi.com/1422-0067/21/6/1997/pdf |
| article xml uploaded. | 15 March 2020 07:05 CET | Update | https://www.mdpi.com/1422-0067/21/6/1997/xml |
| article xml file uploaded | 15 March 2020 07:05 CET | Original file | - |
