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| article html file updated | 30 September 2019 20:04 CEST | Update | - |
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| article xml uploaded. | 22 February 2018 10:31 CET | Update | https://www.mdpi.com/2076-3921/7/2/30/xml |
| article pdf uploaded. | 22 February 2018 10:31 CET | Updated version of record | https://www.mdpi.com/2076-3921/7/2/30/pdf |
| article html file updated | 22 February 2018 09:40 CET | Original file | - |
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| article pdf uploaded. | 22 February 2018 09:38 CET | Updated version of record | https://www.mdpi.com/2076-3921/7/2/30/pdf-vor |
| article pdf uploaded. | 15 February 2018 12:58 CET | Version of Record | https://www.mdpi.com/2076-3921/7/2/30/pdf-vor |
