| article html file updated | 8 February 2020 04:56 CET | Update | https://www.mdpi.com/2079-9284/4/2/12 |
| article html file updated | 24 September 2019 15:10 CEST | Update | - |
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| article html file updated | 23 May 2017 03:33 CEST | Update | - |
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| article xml uploaded. | 3 May 2017 15:42 CEST | Original file | https://www.mdpi.com/2079-9284/4/2/12/xml |
| article pdf uploaded. | 3 May 2017 15:42 CEST | Version of Record | https://www.mdpi.com/2079-9284/4/2/12/pdf |
