| article html file updated | 7 February 2020 10:20 CET | Update | https://www.mdpi.com/2304-6732/3/2/40 |
| article html file updated | 5 May 2019 12:38 CEST | Update | - |
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| article html file updated | 1 July 2016 13:36 CEST | Update | - |
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| article xml uploaded. | 17 June 2016 09:44 CEST | Update | https://www.mdpi.com/2304-6732/3/2/40/xml |
| article pdf uploaded. | 17 June 2016 09:44 CEST | Version of Record | https://www.mdpi.com/2304-6732/3/2/40/pdf |
