| article html file updated | 8 February 2020 03:11 CET | Update | https://www.mdpi.com/2306-5729/2/2/13 |
| article html file updated | 4 May 2019 02:59 CEST | Update | N/A |
| article html file updated | 8 April 2017 13:20 CEST | Original file | N/A |
| article xml uploaded. | 8 April 2017 13:19 CEST | Original file | https://www.mdpi.com/2306-5729/2/2/13/xml |
| article pdf uploaded. | 8 April 2017 13:19 CEST | Version of Record | https://www.mdpi.com/2306-5729/2/2/13/pdf |
