| article html file updated | 8 February 2020 20:42 CET | Update | https://www.mdpi.com/2227-9032/5/4/87 |
| article html file updated | 28 September 2019 08:18 CEST | Update | - |
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| article html file updated | 2 January 2018 12:43 CET | Update | - |
| article html file updated | 9 November 2017 08:59 CET | Original file | - |
| article xml uploaded. | 9 November 2017 08:58 CET | Original file | https://www.mdpi.com/2227-9032/5/4/87/xml |
| article pdf uploaded. | 9 November 2017 08:58 CET | Version of Record | https://www.mdpi.com/2227-9032/5/4/87/pdf |
