| article html file updated | 12 August 2026 22:28 CEST | Update | https://www.mdpi.com/2076-3387/4/1/51 |
| article html file updated | 6 February 2020 07:20 CET | Update | N/A |
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| article html file updated | 19 August 2015 20:51 CEST | Original file | N/A |
| article pdf uploaded. | 20 February 2014 10:38 CET | Updated version of record | https://www.mdpi.com/2076-3387/4/1/51/pdf |
| article pdf uploaded. | 19 February 2014 13:34 CET | Version of Record | https://www.mdpi.com/2076-3387/4/1/51/pdf-vor |
