| article html file updated | 7 February 2020 21:22 CET | Update | https://www.mdpi.com/2079-9276/6/1/3 |
| article html file updated | 22 September 2019 20:48 CEST | Update | - |
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| article html file updated | 30 March 2017 08:55 CEST | Update | - |
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| article xml uploaded. | 13 January 2017 09:04 CET | Original file | https://www.mdpi.com/2079-9276/6/1/3/xml |
| article pdf uploaded. | 13 January 2017 09:04 CET | Version of Record | https://www.mdpi.com/2079-9276/6/1/3/pdf |
