| article html file updated | 6 February 2020 15:05 CET | Update | https://www.mdpi.com/2076-3298/2/1/44 |
| article html file updated | 7 May 2019 02:40 CEST | Update | N/A |
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| article xml file uploaded | 15 February 2015 10:06 CET | Update | https://www.mdpi.com/2076-3298/2/1/44/xml |
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| article html file updated | 29 January 2015 07:38 CET | Original file | N/A |
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| article pdf uploaded. | 21 January 2015 10:59 CET | Updated version of record | https://www.mdpi.com/2076-3298/2/1/44/pdf |
| article pdf uploaded. | 9 January 2015 14:41 CET | Version of Record | https://www.mdpi.com/2076-3298/2/1/44/pdf-vor |