[MathOuvrage]
Virtual turning points
/ Honda, Naofumi ; Kawai, Takahiro ; Takei, Yoshitsugu.
-Tokyo : Springer, 2015. - xii, 126 p. ; 24 cm
ISBN 9784431557012
[MathOuvrage]
Algebraic analysis of singular perturbation theory
/ Kawai, Takahiro ; Takei, Yoshitsugu ; Trad. Kato, Goro.
-Providence RI : American mathematical Society, 2005. - xiii, 128 p. ; 22 cm
ISBN 9780821835470