| article html file updated | 8 February 2020 07:08 CET | Update | https://www.mdpi.com/2227-7072/5/2/14 |
| article html file updated | 25 September 2019 02:35 CEST | Update | - |
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| article html file updated | 28 June 2017 13:16 CEST | Update | - |
| article html file updated | 31 May 2017 14:48 CEST | Original file | - |
| article xml uploaded. | 31 May 2017 14:47 CEST | Original file | https://www.mdpi.com/2227-7072/5/2/14/xml |
| article pdf uploaded. | 31 May 2017 14:47 CEST | Version of Record | https://www.mdpi.com/2227-7072/5/2/14/pdf |
