| article html file updated | 6 February 2020 02:19 CET | Update | https://www.mdpi.com/1999-5903/5/2/268 |
| article html file updated | 8 May 2019 04:44 CEST | Update | N/A |
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| article xml uploaded. | 21 July 2017 04:12 CEST | Original file | https://www.mdpi.com/1999-5903/5/2/268/xml |
| article pdf uploaded. | 24 May 2013 16:29 CEST | Version of Record | https://www.mdpi.com/1999-5903/5/2/268/pdf |