| article html file updated | 7 February 2020 10:49 CET | Update | https://www.mdpi.com/2304-6740/4/3/20 |
| article html file updated | 5 May 2019 11:46 CEST | Update | - |
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| article html file updated | 28 September 2016 10:53 CEST | Update | - |
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| article xml uploaded. | 27 June 2016 08:39 CEST | Update | https://www.mdpi.com/2304-6740/4/3/20/xml |
| article pdf uploaded. | 27 June 2016 08:39 CEST | Version of Record | https://www.mdpi.com/2304-6740/4/3/20/pdf |
