R. V. Krechetnikov Samuel Paolucci Marginal and weakly nonlinear stability in spatially developing flows. 329-335 2003 16 Appl. Math. Lett. 3 http://dx.doi.org/10.1016/S0893-9659(03)80053-8 db/journals/appml/appml16.html#KrechetnikovP03