| article html file updated | 8 February 2020 20:18 CET | Update | https://www.mdpi.com/2076-393X/5/4/40 |
| article html file updated | 28 September 2019 05:33 CEST | Update | - |
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| article html file updated | 2 January 2018 09:59 CET | Update | - |
| article html file updated | 3 November 2017 16:30 CET | Original file | - |
| article xml uploaded. | 3 November 2017 16:29 CET | Original file | https://www.mdpi.com/2076-393X/5/4/40/xml |
| article pdf uploaded. | 3 November 2017 16:29 CET | Version of Record | https://www.mdpi.com/2076-393X/5/4/40/pdf |
