Andrei Bourchtein Ludmila Bourchtein Maxim Naumov On correctness of the vertical discretization in numerical weather prediction models. 513-527 2004 158 Applied Mathematics and Computation 2 http://dx.doi.org/10.1016/j.amc.2003.09.009 db/journals/amc/amc158.html#BourchteinBN04