| article html file updated | 7 February 2020 23:11 CET | Update | https://www.mdpi.com/2297-8739/4/1/5 |
| article html file updated | 23 September 2019 06:49 CEST | Update | - |
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| article html file updated | 30 March 2017 03:31 CEST | Update | - |
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| article xml uploaded. | 11 February 2017 11:05 CET | Original file | https://www.mdpi.com/2297-8739/4/1/5/xml |
| article pdf uploaded. | 11 February 2017 11:05 CET | Version of Record | https://www.mdpi.com/2297-8739/4/1/5/pdf |
