| article html file updated | 8 February 2020 20:11 CET | Update | https://www.mdpi.com/2227-9717/5/4/66 |
| article html file updated | 2 May 2019 17:18 CEST | Update | - |
| article html file updated | 2 January 2018 11:49 CET | Update | - |
| article html file updated | 21 December 2017 03:08 CET | Update | - |
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| article xml uploaded. | 21 December 2017 02:19 CET | Update | https://www.mdpi.com/2227-9717/5/4/66/xml |
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| article html file updated | 2 November 2017 13:07 CET | Original file | - |
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| article pdf uploaded. | 2 November 2017 13:06 CET | Version of Record | https://www.mdpi.com/2227-9717/5/4/66/pdf |
