| article html file updated | 24 December 2025 13:50 CET | Update | https://www.mdpi.com/2221-3759/3/4/177 |
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| article pdf uploaded. | 18 December 2015 09:23 CET | Version of Record | https://www.mdpi.com/2221-3759/3/4/177/pdf |
| article xml uploaded. | 18 December 2015 09:23 CET | Original file | https://www.mdpi.com/2221-3759/3/4/177/xml |
