| article html file updated | 26 September 2022 12:01 CEST | Original file | https://www.mdpi.com/2504-3900/2/6/240 |
| article pdf uploaded. | 23 March 2018 04:57 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/6/240/pdf |
| article pdf uploaded. | 24 February 2018 10:20 CET | Version of Record | https://www.mdpi.com/2504-3900/2/6/240/pdf-vor |
