Differential equations, higher monotonicity and principal pair of solutions Vosmanský, J. (1990) Equadiff 7
Differential subspaces associated with pairs of ordinary differential operators Coddington, E. A. (1979) Equadiff IV
Dissipation and asymptotic behaviour of some reaction-diffusion systems Gröger, Konrad (1982) Equadiff 5
Dual finite element analysis for some unilateral boundary value problems Hlaváček, I. (1979) Equadiff IV