| article html file updated | 7 February 2020 06:23 CET | Update | https://www.mdpi.com/2304-8158/5/2/23 |
| article html file updated | 5 May 2019 20:29 CEST | Update | - |
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| article xml uploaded. | 25 March 2016 07:51 CET | Original file | https://www.mdpi.com/2304-8158/5/2/23/xml |
| article pdf uploaded. | 25 March 2016 07:51 CET | Version of Record | https://www.mdpi.com/2304-8158/5/2/23/pdf |
