| article html file updated | 7 February 2020 04:08 CET | Update | https://www.mdpi.com/2076-3417/6/2/40 |
| article html file updated | 6 May 2019 01:16 CEST | Update | N/A |
| article html file updated | 26 March 2019 19:49 CET | Original file | N/A |
| article pdf uploaded. | 1 February 2016 08:49 CET | Version of Record | https://www.mdpi.com/2076-3417/6/2/40/pdf |
| article xml uploaded. | 1 February 2016 08:49 CET | Original file | https://www.mdpi.com/2076-3417/6/2/40/xml |
