| article html file updated | 8 February 2020 04:09 CET | Update | https://www.mdpi.com/2073-4395/7/2/31 |
| article html file updated | 24 September 2019 11:04 CEST | Update | - |
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| article html file updated | 28 June 2017 12:21 CEST | Update | - |
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| article xml uploaded. | 22 April 2017 09:34 CEST | Original file | https://www.mdpi.com/2073-4395/7/2/31/xml |
| article pdf uploaded. | 22 April 2017 09:34 CEST | Version of Record | https://www.mdpi.com/2073-4395/7/2/31/pdf |
