| article html file updated | 8 February 2020 02:03 CET | Update | https://www.mdpi.com/2072-6643/9/4/320 |
| article html file updated | 23 September 2019 23:16 CEST | Update | - |
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| article html file updated | 28 April 2017 11:55 CEST | Update | - |
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| article html file updated | 23 March 2017 09:39 CET | Original file | - |
| article xml uploaded. | 23 March 2017 09:37 CET | Original file | https://www.mdpi.com/2072-6643/9/4/320/xml |
| article pdf uploaded. | 23 March 2017 09:37 CET | Version of Record | https://www.mdpi.com/2072-6643/9/4/320/pdf |
