9Novotny GM, Pirozynski WJ. Tumors of major salivary glands. Re- view of 100 consecutive cases treated at the Royal Victoria Hospi- tal, Montreal, Canada [ J ]. Laryngoscope, 1968,78 ( 12 ) : 2160 2169.
10Toida M, Mukai K, Shimosato Y, et al. Simultaneous occurrence of bilateral Warthin's tumors and pleomorpbic adenoma in the parotid glands [ J ]. J Oral Maxillofac Surg, 1990,48 ( 10 ) : 1109 - 1113.
