| article html file updated | 14 August 2026 17:59 CEST | Update | https://www.mdpi.com/2309-608X/3/4/53 |
| article html file updated | 8 February 2020 17:42 CET | Update | N/A |
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| article pdf uploaded. | 2 October 2017 12:57 CEST | Version of Record | https://www.mdpi.com/2309-608X/3/4/53/pdf |
