| article html file updated | 7 February 2020 06:48 CET | Update | https://www.mdpi.com/2076-3298/3/2/9 |
| article html file updated | 5 May 2019 19:38 CEST | Update | - |
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| article html file updated | 29 June 2016 10:53 CEST | Update | - |
| article html file updated | 2 April 2016 11:22 CEST | Original file | - |
| article xml uploaded. | 2 April 2016 11:21 CEST | Original file | https://www.mdpi.com/2076-3298/3/2/9/xml |
| article pdf uploaded. | 2 April 2016 11:21 CEST | Version of Record | https://www.mdpi.com/2076-3298/3/2/9/pdf |
