| article html file updated | 6 February 2020 18:07 CET | Update | https://www.mdpi.com/2076-3387/5/2/46 |
| article html file updated | 20 September 2019 20:44 CEST | Update | N/A |
| article html file updated | 6 May 2019 21:02 CEST | Update | N/A |
| article html file updated | 26 March 2019 01:35 CET | Update | N/A |
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| article html file updated | 21 August 2015 11:18 CEST | Original file | N/A |
| article pdf uploaded. | 28 April 2015 13:52 CEST | Version of Record | https://www.mdpi.com/2076-3387/5/2/46/pdf |
