| article html file updated | 6 September 2025 19:23 CEST | Update | https://www.mdpi.com/2218-1997/4/1/11 |
| article html file updated | 9 February 2020 01:58 CET | Update | N/A |
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| article pdf uploaded. | 5 January 2018 10:40 CET | Updated version of record | https://www.mdpi.com/2218-1997/4/1/11/pdf |
| article html file updated | 4 January 2018 08:55 CET | Original file | N/A |
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