1. Arendt, W., Batty, C.J.K., Neubrander, F.: Vector-Valued Laplace Transforms and Cauchy Problems. Springer, Berlin (2011)
2. Bertoin, J., Roynette, B., Yor, M.: Some connections between (sub)critical branching mechanisms and Bernstein functions. http://arxiv.org/abs/math/0412322 (2004)
3. Bhatia, R.: Matrix Analysis. Springer, Berlin (1997)
4. Borwein, J., Hijab, O.: Convex! II Solution of Problem 99–002. Society for Industrial and Applied Mathematics, Philadelphia, Pennsylvania. http://www.siam.org/journals/problems/downloadfiles/99-5sii.pdf (2000)
5. Carter, M., van Brunt, B.: The Lebesgue-Stieltjes Integral: A Practical Introduction. Springer, New York Inc (2000)