[1] B. EFIMOV: 
Dyadic bicompacta. Trans. Mosc. Math. Soc. 14 (1965), 229-267. 
MR 0202105[3] Z. FROLÍK: 
Fixed points of maps of extremally disconnected spaces and complete Boolean algebras. Bull. Acad. Polon. Sci. Ser. Sci. Math. Astronom. Phys. 16 (1968), 269-275. 
MR 0233343[4] M. KATĚTOV: 
A theorem on mappings. Comment. Math. Univ. Carolinae 8 (1967), 431-433. 
MR 0229228