| article html file updated | 8 February 2020 21:40 CET | Update | https://www.mdpi.com/2227-9059/5/4/66 |
| article html file updated | 28 September 2019 14:37 CEST | Update | N/A |
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| article xml uploaded. | 20 November 2017 13:04 CET | Original file | https://www.mdpi.com/2227-9059/5/4/66/xml |
| article pdf uploaded. | 20 November 2017 13:04 CET | Version of Record | https://www.mdpi.com/2227-9059/5/4/66/pdf |
