Exponential-type Nagumo norms and summability of formal solutions of singular partial differential equations

Luo, Zhuangchu; Chen, Hua; Zhang, Changgui

Annales de l'Institut Fourier, Volume 62 (2012) p. 571-618

Formal solutions of nonlinear first order totally characteristic type PDE with irregular singularity

Chen, Hua; Luo, Zhuangchu; Tahara, Hidetoshi

Annales de l'Institut Fourier, Volume 51 (2001) p. 1599-1620