| article html file updated | 8 February 2020 19:57 CET | Update | https://www.mdpi.com/2076-393X/5/4/39 |
| article html file updated | 28 September 2019 03:23 CEST | Update | - |
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| article html file updated | 2 January 2018 09:59 CET | Update | - |
| article html file updated | 31 October 2017 13:36 CET | Original file | - |
| article xml uploaded. | 31 October 2017 13:34 CET | Original file | https://www.mdpi.com/2076-393X/5/4/39/xml |
| article pdf uploaded. | 31 October 2017 13:34 CET | Version of Record | https://www.mdpi.com/2076-393X/5/4/39/pdf |
