This author has not been identified. Look up 'Vincenzo Bonnici' in GoogleThis author has not been identified. Look up 'Rosalba Giugno' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Alfredo Pulvirenti' in GoogleThis author has not been identified. Look up 'Dennis Shasha' in GoogleThis author has not been identified. Look up 'Alfredo Ferro' in Google