| article html file updated | 31 August 2025 07:30 CEST | Update | https://www.mdpi.com/1422-0067/21/1/171 |
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| article pdf uploaded. | 25 December 2019 15:51 CET | Version of Record | https://www.mdpi.com/1422-0067/21/1/171/pdf |
| article xml uploaded. | 25 December 2019 15:51 CET | Update | https://www.mdpi.com/1422-0067/21/1/171/xml |
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