Other methods have been proposed and are currently under development.

Many other methods of treating the problem have been proposed since.

For continuous data, two other simple methods have been proposed.

A new method was proposed by White et al (2012).

There are many methods proposed by scientists in this area.

Several methods have been proposed to reduce the cross terms.

Various methods or tools of analysis are proposed and explained.

Better methods of enforcement in addition to new policies are proposed to be a help.

The methods proposed by this movement are low cost and simple to implement.

The method was first proposed in the 1950s, and it can be now viewed as a special case of many other more general methods.