| article html file updated | 31 August 2025 06:51 CEST | Update | https://www.mdpi.com/1422-0067/21/1/4 |
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| article supplementary file uploaded. | 18 December 2019 10:40 CET | - | https://www.mdpi.com/1422-0067/21/1/4#supplementary |
| article pdf uploaded. | 18 December 2019 10:40 CET | Version of Record | https://www.mdpi.com/1422-0067/21/1/4/pdf |
| article xml uploaded. | 18 December 2019 10:40 CET | Update | https://www.mdpi.com/1422-0067/21/1/4/xml |
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