Celebratio Mathematica

incollection S.-S. Chern and P. A. Grif­fiths: “Pfaf­fi­an sys­tems in in­vol­u­tion,” pp. 233–​256 in Pro­ceed­ings of the 1982 Changchun sym­posi­um on dif­fer­en­tial geo­metry and dif­fer­en­tial equa­tions (Changchun, China, 23 Au­gust–16 Septem­ber 1982). Edi­ted by S.-S. Chern, R.-H. Wang, and M.-Y. Chi. Sci­ence Press (Beijing), 1986. Zbl 0677.​58005

book Pro­ceed­ings of the 1982 Changchun sym­posi­um on dif­fer­en­tial geo­metry and dif­fer­en­tial equa­tions (Changchun, China, 23 Au­gust–16 Septem­ber 1982). Edi­ted by S.-S. Chern, R.-H. Wang, and M.-y. Chi. Sci­ence Press (Beijing), 1986. Zbl 0646.​00007