7Hedinger C, Williams E D, Sobin L H. The WHO histological classification of thyroid tumors:acommentary on the second edition[J]. Cancer, 1989, 63(3):908.
8Bramley M D, Harrison B J. Papillary microcarcinoma of the thyroid gland[J]. Br J Surg, 1996, 83(12):1674-1683.
9Yamashita H, Nakayama A I, Noguchi S. Minute carcinoma of the thyroid and its development to advanced carcinoma[J]. Acta pathol Jpn, 1985,35(2) :377-383.
10Alo M D,Christianson W,Koivunen D. Not all "occult" papillary carcinoma are "minimal"[J ]. Surgery, 1988,104 (6) : 971.