The Bertalanffy equation is an equation that describes the rate of growth of a
biological organism. The equation was offered by Ludwig von Bertalanffy in 1969.

## Solution

Integrating the equation gives:

  $$ l = L \(1 - e^{-Kt}\) $$

## References

The body of this page comes from Wikipedia.

* Wikipedia:
  [Bertalanffy equation](https://en.wikipedia.org/wiki/Ludwig_von_Bertalanffy#Bertalanffy_equation)
* [The von Bertalanffy growth equation](http://www.pisces-conservation.com/growthhelp/index.html?von_bertalanffy.htm)

### Papers

Bertalanffy, L. von, (1969). *General System Theory*. New York: George
Braziller, pp. 136