A theorem on plane continua

W. T. Reid
1935 Bulletin of the American Mathematical Society  
the connected point sets B n and B m have no point in common, there clearly exists no point set consisting of a finite number of connected subsets of M and separating G from A in M.
doi:10.1090/s0002-9904-1935-06173-7 fatcat:inb5tziierd6djuyf5asmkm2he