| article html file updated | 8 February 2020 11:48 CET | Update | https://www.mdpi.com/1999-4907/8/7/257 |
| article html file updated | 26 September 2019 03:02 CEST | Update | N/A |
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| article xml uploaded. | 23 July 2017 07:47 CEST | Original file | https://www.mdpi.com/1999-4907/8/7/257/xml |
| article pdf uploaded. | 23 July 2017 07:47 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/7/257/pdf |