| article html file updated | 31 August 2025 07:04 CEST | Update | https://www.mdpi.com/1422-0067/21/1/63 |
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| article pdf uploaded. | 20 December 2019 10:50 CET | Version of Record | https://www.mdpi.com/1422-0067/21/1/63/pdf |
| article xml uploaded. | 20 December 2019 10:50 CET | Update | https://www.mdpi.com/1422-0067/21/1/63/xml |
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