The philosophy of Edmund Husserl / by O. Becker
The phenomenological philosophy of Edmund Husserl and contemporary criticism / by E. Fink
The decisive phases in the development of Husserl's philosophy / by W. Biemel
Husserl's concept of the "absolute," / by R. Boehm
Critical observations concerning Husserl's posthumous writings, by H. Wagner
Husserl's departure from Cartesianism / by L. Landgrebe.