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| article pdf uploaded. | 26 January 2018 07:09 CET | Updated version of record | https://www.mdpi.com/2304-8158/7/2/12/pdf |
| article html file updated | 24 January 2018 12:28 CET | Update | - |
| article xml uploaded. | 24 January 2018 12:27 CET | Update | https://www.mdpi.com/2304-8158/7/2/12/xml |
| article pdf uploaded. | 24 January 2018 12:27 CET | Updated version of record | https://www.mdpi.com/2304-8158/7/2/12/pdf-vor |
| article html file updated | 24 January 2018 03:14 CET | Original file | - |
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| article xml uploaded. | 23 January 2018 18:45 CET | Update | - |
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| article pdf uploaded. | 23 January 2018 18:45 CET | Version of Record | https://www.mdpi.com/2304-8158/7/2/12/pdf-vor |
