| article html file updated | 31 August 2025 05:50 CEST | Update | https://www.mdpi.com/2218-0532/87/4/34 |
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| article pdf uploaded. | 19 December 2019 05:19 CET | Updated version of record | https://www.mdpi.com/2218-0532/87/4/34/pdf |
| article xml uploaded. | 19 December 2019 05:19 CET | Update | https://www.mdpi.com/2218-0532/87/4/34/xml |
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| article pdf uploaded. | 5 December 2019 14:40 CET | Version of Record | https://www.mdpi.com/2218-0532/87/4/34/pdf-vor |
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