| article html file updated | 8 February 2020 02:33 CET | Update | https://www.mdpi.com/2076-0752/6/2/3 |
| article html file updated | 4 May 2019 04:23 CEST | Update | - |
| article html file updated | 30 June 2017 09:05 CEST | Update | - |
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| article html file updated | 5 April 2017 14:25 CEST | Original file | - |
| article xml uploaded. | 5 April 2017 14:24 CEST | Original file | https://www.mdpi.com/2076-0752/6/2/3/xml |
| article pdf uploaded. | 5 April 2017 14:24 CEST | Version of Record | https://www.mdpi.com/2076-0752/6/2/3/pdf |
