| article html file updated | 7 February 2020 20:46 CET | Update | https://www.mdpi.com/2227-9059/5/1/3 |
| article html file updated | 22 September 2019 17:49 CEST | Update | - |
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| article xml uploaded. | 4 January 2017 11:05 CET | Original file | https://www.mdpi.com/2227-9059/5/1/3/xml |
| article pdf uploaded. | 4 January 2017 11:05 CET | Version of Record | https://www.mdpi.com/2227-9059/5/1/3/pdf |
