| article html file updated | 7 February 2020 21:22 CET | Update | https://www.mdpi.com/2311-553X/3/1/4 |
| article html file updated | 4 May 2019 15:32 CEST | Update | - |
| article html file updated | 30 March 2017 11:31 CEST | Update | - |
| article html file updated | 12 January 2017 13:14 CET | Update | - |
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| article xml uploaded. | 12 January 2017 13:13 CET | Original file | https://www.mdpi.com/2311-553X/3/1/4/xml |
| article pdf uploaded. | 12 January 2017 13:13 CET | Version of Record | https://www.mdpi.com/2311-553X/3/1/4/pdf |
