| article html file updated | 29 August 2025 20:30 CEST | Update | https://www.mdpi.com/2218-1989/2/4/891 |
| article html file updated | 15 July 2022 22:02 CEST | Update | - |
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| article html file updated | 7 January 2014 12:27 CET | Update | - |
| article xml file uploaded | 7 January 2014 12:27 CET | Update | https://www.mdpi.com/2218-1989/2/4/891/xml |
| article html file updated | 30 August 2013 09:15 CEST | Update | - |
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| article supplementary file uploaded. | 26 August 2013 08:48 CEST | - | https://www.mdpi.com/2218-1989/2/4/891#supplementary |
| article html file updated | 7 February 2013 16:34 CET | Update | - |
| article html file updated | 24 January 2013 07:46 CET | Original file | - |
