| article html file updated | 6 February 2020 05:11 CET | Update | https://www.mdpi.com/2227-9040/1/3/33 |
| article html file updated | 7 May 2019 22:47 CEST | Update | - |
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| article html file updated | 17 June 2015 14:19 CEST | Update | - |
| article html file updated | 29 October 2013 18:01 CET | Original file | - |
| article xml uploaded. | 29 October 2013 18:01 CET | Original file | https://www.mdpi.com/2227-9040/1/3/33/xml |
| article pdf uploaded. | 28 October 2013 11:31 CET | Version of Record | https://www.mdpi.com/2227-9040/1/3/33/pdf |
