I have recently posted a couple of questions in regards to Generalized Hyperbolic and Circular Functions and I was hoping to find a couple more papers available on the particular subject. The papers I have found are
Beyond Sin and Cos by Muldoon and Ungar
Generalized Hyperbolic Functions by Muldoon
On generalized hyperbolic functions and their characterization by functional equations By Schwaiger (I have not read this one as I can't find a pdf online and am not a member).
I have scrolled through the references of the first two and gotten a couple of tidbits, but if anyone can point me in the direction of more papers or research, that would be very helpful