| article html file updated | 8 February 2020 02:30 CET | Update | https://www.mdpi.com/2304-6775/5/2/6 |
| article html file updated | 24 September 2019 01:42 CEST | Update | - |
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| article html file updated | 29 June 2017 12:21 CEST | Update | - |
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| article xml uploaded. | 29 March 2017 14:38 CEST | Original file | https://www.mdpi.com/2304-6775/5/2/6/xml |
| article pdf uploaded. | 29 March 2017 14:38 CEST | Version of Record | https://www.mdpi.com/2304-6775/5/2/6/pdf |
