| article html file updated | 8 February 2020 22:01 CET | Update | https://www.mdpi.com/2311-5521/2/4/64 |
| article html file updated | 28 September 2019 16:49 CEST | Update | - |
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| article html file updated | 27 November 2017 08:44 CET | Update | - |
| article xml uploaded. | 27 November 2017 08:42 CET | Update | https://www.mdpi.com/2311-5521/2/4/64/xml |
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| article pdf uploaded. | 27 November 2017 08:42 CET | Updated version of record | https://www.mdpi.com/2311-5521/2/4/64/pdf |
| article html file updated | 23 November 2017 14:20 CET | Original file | - |
| article xml uploaded. | 23 November 2017 14:19 CET | Original file | - |
| article pdf uploaded. | 23 November 2017 14:19 CET | Version of Record | https://www.mdpi.com/2311-5521/2/4/64/pdf-vor |
