Pflug, G.C. <https://pure.iiasa.ac.at/view/iiasa/229.html> ORCID: https://orcid.org/0000-0001-8215-3550 <https://orcid.org/0000-0001-8215-3550>  (1996).  Optimization of Stochastic Models.     USA: Springer Verlag.  ISBN 978-1-4613-1449-3