YE, Yunhua. Logarithmic convexity of the eigenfunction of the Hessian operator in the ball. International Journal of Advanced Mathematical Sciences, [S. l.], v. 3, n. 2, p. 98–102, 2015. DOI: 10.14419/ijams.v3i2.4979. Disponível em: https://www.sciencepubco.com/index.php/IJAMS/article/view/4979.. Acesso em: 2 may. 2024.