| article html file updated | 30 August 2025 01:35 CEST | Update | https://www.mdpi.com/2218-1997/3/4/75 |
| article html file updated | 16 July 2022 07:08 CEST | Update | N/A |
| article html file updated | 8 February 2020 20:03 CET | Update | N/A |
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| article html file updated | 1 November 2017 14:03 CET | Original file | N/A |
| article xml uploaded. | 1 November 2017 14:01 CET | Update | https://www.mdpi.com/2218-1997/3/4/75/xml |
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| article pdf uploaded. | 1 November 2017 14:01 CET | Version of Record | https://www.mdpi.com/2218-1997/3/4/75/pdf |
