| article html file updated | 8 February 2020 02:20 CET | Update | https://www.mdpi.com/2076-3271/5/2/6 |
| article html file updated | 24 September 2019 00:43 CEST | Update | N/A |
| article html file updated | 4 May 2019 04:51 CEST | Update | N/A |
| article html file updated | 30 March 2017 05:28 CEST | Original file | N/A |
| article xml uploaded. | 30 March 2017 05:26 CEST | Original file | https://www.mdpi.com/2076-3271/5/2/6/xml |
| article pdf uploaded. | 30 March 2017 05:26 CEST | Updated version of record | https://www.mdpi.com/2076-3271/5/2/6/pdf |
| article pdf uploaded. | 27 March 2017 12:43 CEST | Version of Record | https://www.mdpi.com/2076-3271/5/2/6/pdf-vor |
