열린 문제 (Korean Wikipedia)

Analysis of information sources in references of the Wikipedia article "열린 문제" in Korean language version.

refsWebsite
Global rank Korean rank
451st place
121st place
5th place
11th place

ams.org

mathscinet.ams.org

  • K. Appel and W. Haken (1977), "Every planar map is four colorable. Part I. Discharging", Illinois J. Math 21: 429–490. MR543795
  • K. Appel, W. Haken, and J. Koch (1977), "Every planar map is four colorable. Part II. Reducibility", Illinois J. Math 21: 491–567. MR543795

ams.org

worldcat.org