| article html file updated | 26 September 2022 13:24 CEST | Original file | https://www.mdpi.com/2504-3900/2/6/241 |
| article pdf uploaded. | 23 March 2018 04:22 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/6/241/pdf |
| article pdf uploaded. | 11 February 2018 12:03 CET | Version of Record | https://www.mdpi.com/2504-3900/2/6/241/pdf-vor |
