Michael Hopkins: The mathematical work of Douglas C. Ravenel, Homology Homotopy Appl. 10 3 (2008) 1-13 [euclid:hha/1251832464] On the Adams-Novikov spectral sequence: On chromatic homotopy theory and introducing Ravenel's spectra and Ravenel's conjectures: On stable homotopy groups of spheres and chromatic homotopy theory: On stable homotopy groups of spheres and chromatic homotopy theory: Doug Ravenel, Nilpotence and Periodicity in Stable Homotopy Theory, Annals of Mathematics Studies 128,...