TY - JOUR TI - The (n + 2)ndHomotopy Group of the n-Sphere T2 - Annals of Mathematics VL - 52 IS - 2 SP - 245 EP - 247 AU - Whitehead, George W. PB - Princeton University PY - 1950 PY - 1950 LA - English SN - 0003-486X UR - https://www.jstor.org/stable/1969466 UR - https://katalog.skd.museum/Record/ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS8xOTY5NDY2 ER -