"The present work is the revised version of a part of Ph.D. thesis of the autor [i.e. author] written at the Faculty of Mathematics and Computers Scie...
"The present work is the revised version of a part of Ph.D. thesis of the autor [i.e. author] written at the Faculty of Mathematics and Computers Science of the Nicolaus Copernicus University in Toruń, Poland."--Preface.
書誌注記
Includes bibliographical references (p. 145-148) .