1. Optimal control of Markov processes with incomplete state information
2. ‘Stochastic control problems’, in (ed.), Mathematical Control Theory; Lecture Notes in Mathematics, Springer-Verlag, Berlin, 1978.
3. Dual control of an integrator with unknown gain
4. ‘Optimal dual control of a simple process with unknown gain’, Technical Paper TP 18.196, IBM Nordic Laboratory, Lidingö, Sweden, 1969.