The XPP code associated with the paper:

Teka W, Tabak J, Bertram R (2012) The relationship between two
fast-slow analysis techniques for bursting oscillations. Chaos
22:043117

is available at this website:
http://www.math.fsu.edu/~bertram/software/pituitary/
and specifically this link:
http://www.math.fsu.edu/~bertram/software/pituitary/Chaos_12.ode
These web pages were accessed last June 6th, 2014.

Note from the ModelDB administrator: to run with XPP version 7.0 I
found I needed to change bell=off to bell=0 on one of the last few
lines.

The model when run with a parameter on line 18 changed to Cm=10
produces a graph like the paper Figure 1A:

screenshot

Note that it needs 55 seconds of simulation to settle down: e.g. it
starts like this:

screenshot

Adjusting the kc=0.1 on line 17 generates a figure similar to Fig 1C:

screenshot