| article html file updated | 7 February 2020 23:25 CET | Update | https://www.mdpi.com/2075-4701/7/2/56 |
| article html file updated | 23 September 2019 08:02 CEST | Update | - |
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| article html file updated | 1 March 2017 03:54 CET | Update | - |
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| article xml uploaded. | 15 February 2017 07:39 CET | Original file | https://www.mdpi.com/2075-4701/7/2/56/xml |
| article pdf uploaded. | 15 February 2017 07:39 CET | Version of Record | https://www.mdpi.com/2075-4701/7/2/56/pdf |
