Volume 31, Issue 5, September and October 2019, Pages 327-328
10.22038/ijorl.2018.30191.1989
Andrea Preti; Mario Turri-Zanoni; Alberto-Daniele Arosio; Paolo Castelnuovo; Paolo Battaglia
Volume 19, Issue 48, July and August 2007, Pages 79-82
Ali Ghazipoor; Nader Akbari Dilmaghani