| article html file updated | 8 February 2020 02:06 CET | Update | https://www.mdpi.com/2073-4441/9/4/233 |
| article html file updated | 23 September 2019 23:37 CEST | Update | - |
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| article html file updated | 28 April 2017 11:18 CEST | Update | - |
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| article html file updated | 23 March 2017 12:50 CET | Original file | - |
| article xml uploaded. | 23 March 2017 12:48 CET | Update | https://www.mdpi.com/2073-4441/9/4/233/xml |
| article pdf uploaded. | 23 March 2017 12:48 CET | Version of Record | https://www.mdpi.com/2073-4441/9/4/233/pdf |
