| article html file updated | 31 August 2025 03:19 CEST | Update | https://www.mdpi.com/2218-6581/8/4/90 |
| article html file updated | 20 July 2022 01:08 CEST | Update | - |
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| article html file updated | 31 December 2019 00:42 CET | Update | - |
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| article pdf uploaded. | 1 November 2019 02:58 CET | Updated version of record | https://www.mdpi.com/2218-6581/8/4/90/pdf |
| article xml uploaded. | 1 November 2019 02:58 CET | Update | https://www.mdpi.com/2218-6581/8/4/90/xml |
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| article pdf uploaded. | 22 October 2019 15:47 CEST | Version of Record | https://www.mdpi.com/2218-6581/8/4/90/pdf-vor |
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