| article html file updated | 24 December 2025 16:47 CET | Update | https://www.mdpi.com/1422-0067/21/1/18 |
| article html file updated | 31 August 2025 06:54 CEST | Update | - |
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| article html file updated | 21 December 2019 16:41 CET | Original file | - |
| article pdf uploaded. | 21 December 2019 16:40 CET | Updated version of record | https://www.mdpi.com/1422-0067/21/1/18/pdf |
| article xml uploaded. | 21 December 2019 16:40 CET | Update | https://www.mdpi.com/1422-0067/21/1/18/xml |
| article xml file uploaded | 21 December 2019 16:40 CET | Update | - |
| article supplementary file uploaded. | 18 December 2019 15:11 CET | - | https://www.mdpi.com/1422-0067/21/1/18#supplementary |
| article pdf uploaded. | 18 December 2019 15:11 CET | Version of Record | https://www.mdpi.com/1422-0067/21/1/18/pdf-vor |
| article xml file uploaded | 18 December 2019 15:11 CET | Original file | - |
