A hypercontinuous hypersmooth Schwarzschild line element transformation. Herrmann, Robert A. (1997) International Journal of Mathematics and Mathematical Sciences
Addendum to "Hyperdefinite stochastic integration III". Tom L. Lindström (1980) Mathematica Scandinavica
An elimination of the predicate “to be a standard member” in nonstandard models of arithmetic Karel Čuda (1982) Commentationes Mathematicae Universitatis Carolinae
An operator equation and relativistic alterations in the time of radioactive decay. Herrmann, Robert A. (1996) International Journal of Mathematics and Mathematical Sciences