Figueiredo,, Rui Pacheco de Contribution to the theory of certain non-linear differential equations / Rui Pacheco de Figueiredo

Contribution to the theory of certain non-linear differential equations / Rui Pacheco de Figueiredo . - Lisboa : Junta de Investigação do Ultramar, 1960 . - 125 p. : il. 25 cm . - (Estudos, ensaios e documentos; 73))
517.928.7