J. Christiansen

A collocation solver for mixed order systems of boundary value problems

U. Ascher, R. Russell, J. Christiansen, 1979 .

Adaptive Mesh Selection Strategies for Solving Boundary Value Problems

R. Russell, J. Christiansen, 1978 .

Algorithm 569: COLSYS: Collocation Software for Boundary-Value ODEs [D2]

Robert D. Russell, Uri M. Ascher, J. Christiansen, 1981, TOMS.

COLSYS - - A Collocation Code for Boundary - Value Problems

Robert D. Russell, Uri M. Ascher, J. Christiansen, 1978, Codes for Boundary-Value Problems in Ordinary Differential Equations.

Collocation Software for Boundary-Value ODEs

Robert D. Russell, Uri M. Ascher, J. Christiansen, 1981, TOMS.

Numerical solution of ordinary simultaneous differential equations of the 1st order using a method for automatic step change

J. Christiansen, Jan Christiansen, 1970 .