| article html file updated | 30 August 2025 01:36 CEST | Update | https://www.mdpi.com/2311-5521/2/4/60 |
| article html file updated | 16 July 2022 07:12 CEST | Update | N/A |
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| article pdf uploaded. | 7 November 2017 09:26 CET | Updated version of record | https://www.mdpi.com/2311-5521/2/4/60/pdf |
| article pdf uploaded. | 4 November 2017 11:09 CET | Version of Record | https://www.mdpi.com/2311-5521/2/4/60/pdf-vor |
