| article html file updated | 9 February 2020 07:22 CET | Update | https://www.mdpi.com/2304-6740/6/1/30 |
| article html file updated | 30 September 2019 23:32 CEST | Update | - |
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| article xml uploaded. | 23 February 2018 10:04 CET | Update | https://www.mdpi.com/2304-6740/6/1/30/xml |
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| article pdf uploaded. | 23 February 2018 10:04 CET | Version of Record | https://www.mdpi.com/2304-6740/6/1/30/pdf |