| article html file updated | 9 February 2020 05:28 CET | Update | https://www.mdpi.com/2313-4321/3/1/6 |
| article html file updated | 30 September 2019 12:23 CEST | Update | N/A |
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| article html file updated | 7 February 2018 07:11 CET | Update | N/A |
| article xml uploaded. | 7 February 2018 07:10 CET | Update | https://www.mdpi.com/2313-4321/3/1/6/xml |
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| article pdf uploaded. | 7 February 2018 07:10 CET | Updated version of record | https://www.mdpi.com/2313-4321/3/1/6/pdf |
| article html file updated | 3 February 2018 13:56 CET | Original file | N/A |
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| article pdf uploaded. | 3 February 2018 13:55 CET | Version of Record | https://www.mdpi.com/2313-4321/3/1/6/pdf-vor |