| article html file updated | 6 February 2020 18:53 CET | Update | https://www.mdpi.com/2073-431X/4/2/155 |
| article html file updated | 6 May 2019 19:30 CEST | Update | N/A |
| article html file updated | 26 March 2019 03:11 CET | Update | N/A |
| article html file updated | 21 August 2015 12:28 CEST | Update | N/A |
| article html file updated | 30 June 2015 08:04 CEST | Original file | N/A |
| article xml file uploaded | 30 June 2015 08:04 CEST | Original file | https://www.mdpi.com/2073-431X/4/2/155/xml |
| article pdf uploaded. | 22 May 2015 08:00 CEST | Version of Record | https://www.mdpi.com/2073-431X/4/2/155/pdf |
