| article html file updated | 8 February 2020 02:02 CET | Update | https://www.mdpi.com/2072-4292/9/4/304 |
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| article xml uploaded. | 24 March 2017 07:10 CET | Update | https://www.mdpi.com/2072-4292/9/4/304/xml |
| article pdf uploaded. | 24 March 2017 07:10 CET | Updated version of record | https://www.mdpi.com/2072-4292/9/4/304/pdf |
| article pdf uploaded. | 23 March 2017 10:26 CET | Version of Record | https://www.mdpi.com/2072-4292/9/4/304/pdf-vor |
