| article html file updated | 8 February 2020 18:27 CET | Update | https://www.mdpi.com/2227-9032/5/4/72 |
| article html file updated | 27 September 2019 18:25 CEST | Update | - |
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| article html file updated | 2 January 2018 12:39 CET | Update | - |
| article html file updated | 14 October 2017 09:54 CEST | Original file | - |
| article xml uploaded. | 14 October 2017 09:53 CEST | Original file | https://www.mdpi.com/2227-9032/5/4/72/xml |
| article pdf uploaded. | 14 October 2017 09:53 CEST | Version of Record | https://www.mdpi.com/2227-9032/5/4/72/pdf |
