@MISC{CIRCLED1.MIZ,
  AUTHOR = {Zhai, Fahui and Cao, Jianbing and Liang, Xiquan},
  TITLE = {Circled Sets, Circled Hull, and Circled Family},
  ACKNOWLEDGEMENT = {Thank you, Andrzej Trybulec and Yatsuka Nakamura.},
  SECTION1 = {Circled Sets},
  SECTION2 = {Circled Hull and Circled Family},
  SECTION3 = {Basic Properties of Combination},
  DAY = {30},
  MONTH = {August},
  YEAR = {2005},
  ADDRESS1 = {Department of Mathematics and Physics\\
           Qingdao University of Science and Technology\\China},
  ADDRESS2 = {Department of Mathematics and Physics\\
           Qingdao University of Science and Technology\\China},
  ADDRESS3 = {Department of Mathematics and Physics\\
           Qingdao University of Science and Technology\\China},
  SUMMARY = {In this article, we prove some basic properties of
           the circled sets. We also define the circled hull,
           and give the definition of circled family.}}
