A conforming finite element method with Lagrange multipliers for the biharmonic problem Juhani Pitkaranta — 1980 ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique
On a mixed finite element method for the Stokes problem in ℝ 3 Juhani Pitkäranta — 1982 ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique
The problem of membrane locking in finite element analysis of cylindrical shells. Juhani Pitkäranta — 1992 Numerische Mathematik
Analysis of Some Low-Order Finite Element Schemes for Mindlin-Reissner and Kirchhoff Plates. Juhani Pitkäranta — 1988 Numerische Mathematik