This author has not been identified. Look up 'Mikolaj Leszczuk' in GoogleThis author has not been identified. Look up 'Blazej Szczerba' in GoogleThis author has not been identified. Look up 'Andrzej Glowacz' in GoogleThis author has not been identified. Look up 'Jan Derkacz' in GoogleThis author has not been identified. Look up 'Andrzej Dziech' in GoogleThis author has not been identified. Look up 'Piotr Romaniak' in Google