Question: I am reading a preprint titled *Combinatorial Group Theory In Homotopy Theory I* by Fred Cohen (available at [Cohen's web page](http://www.math.rochester.edu/people/faculty/cohf/))

Now I need to find all papers whose references contain this preprint. Is there any way to do so? (By the way, I have access to Mathscinet.)

Answer: 
Who knows derived following criteria may apply:

If $f:I \rightarrow I$ is differentiable and $p$ is a fixed point such that $f'(p) <1$ then the sequence given by $x\_{n+1}=f(x\_n)$ este converges to $p$.

For $$f:(0,\infty) \rightarrow (0,\infty),f(x)=1+\frac{1}{x},f'(x)=-\frac{1}{x^2},p=\frac{1+\sqrt{5}}{2}, |f'(p)|=\frac{2}{3+\sqrt{5}}<1.$$
You can prove by induction that
$$a\_n = \frac{F\_{n+1}}{F\_n}$$
where $\{F\_n\}\_{n\geq 1}=\{1,1,2,3,5,8,\ldots\}$ is the Fibonacci sequence.

Binet formula hence gives:
$$\lim\_{n\to +\infty} a\_n = \phi = \frac{1+\sqrt{5}}{2}.$$