| article html file updated | 8 February 2020 00:59 CET | Update | https://www.mdpi.com/2226-4787/5/1/15 |
| article html file updated | 23 September 2019 17:10 CEST | Update | - |
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| article html file updated | 28 March 2017 11:57 CEST | Update | - |
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| article xml uploaded. | 8 March 2017 04:21 CET | Original file | https://www.mdpi.com/2226-4787/5/1/15/xml |
| article pdf uploaded. | 8 March 2017 04:21 CET | Version of Record | https://www.mdpi.com/2226-4787/5/1/15/pdf |
