| article html file updated | 7 February 2020 10:02 CET | Update | https://www.mdpi.com/2304-6732/3/2/38 |
| article html file updated | 5 May 2019 13:13 CEST | Update | - |
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| article xml uploaded. | 16 June 2016 11:06 CEST | Update | https://www.mdpi.com/2304-6732/3/2/38/xml |
| article pdf uploaded. | 16 June 2016 11:06 CEST | Updated version of record | https://www.mdpi.com/2304-6732/3/2/38/pdf |
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