| article html file updated | 7 February 2020 03:50 CET | Update | https://www.mdpi.com/2076-3417/6/2/31 |
| article html file updated | 6 May 2019 01:48 CEST | Update | N/A |
| article html file updated | 26 March 2019 19:16 CET | Original file | N/A |
| article pdf uploaded. | 25 January 2016 11:13 CET | Version of Record | https://www.mdpi.com/2076-3417/6/2/31/pdf |
| article xml uploaded. | 25 January 2016 11:13 CET | Original file | https://www.mdpi.com/2076-3417/6/2/31/xml |
