PHADKE, B. B. Sublinearity and Convexity on the Grassmann Cone $G_2^4$. MATHEMATICA SCANDINAVICA, [S. l.], v. 30, p. 249–252, 1972. DOI: 10.7146/math.scand.a-11079. Disponível em: https://www.mscand.dk/article/view/11079. Acesso em: 11 apr. 2025.