| article html file updated | 31 August 2025 18:18 CEST | Update | https://www.mdpi.com/2218-1997/6/4/60 |
| article html file updated | 21 July 2022 02:44 CEST | Update | - |
| article html file updated | 23 April 2020 11:09 CEST | Original file | - |
| article pdf uploaded. | 23 April 2020 11:08 CEST | Version of Record | https://www.mdpi.com/2218-1997/6/4/60/pdf |
| article xml uploaded. | 23 April 2020 11:08 CEST | Update | https://www.mdpi.com/2218-1997/6/4/60/xml |
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