| article html file updated | 7 February 2020 23:32 CET | Update | https://www.mdpi.com/2304-8158/6/2/13 |
| article html file updated | 23 September 2019 08:43 CEST | Update | - |
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| article xml uploaded. | 16 February 2017 10:35 CET | Original file | https://www.mdpi.com/2304-8158/6/2/13/xml |
| article pdf uploaded. | 16 February 2017 10:35 CET | Version of Record | https://www.mdpi.com/2304-8158/6/2/13/pdf |
