Closure of the Laplace-Beltrami Operator on 2D Almost-Riemannian Manifolds and Semi-Fredholm Properties of Differential Operators on Lie Manifolds | Results in Mathematics
PDF] Classification results for three-dimensional (para)contact metric and almost (para)cosymplectic $(\kappa,\mu)$-spaces | Semantic Scholar
PDF) Almost {\alpha}-Cosymplectic ({\kappa},{\mu},{\nu})-Spaces | Murathan Kocatepe - Academia.edu
PDF] Classification results for three-dimensional (para)contact metric and almost (para)cosymplectic $(\kappa,\mu)$-spaces | Semantic Scholar
PDF) Canonical fibrations of contact metric $(\kappa,\mu)$-spaces