doc(README): fix bullet list

Author: rouson

README.md

@@ -63,9 +63,10 @@ See the our [GitHub Pages site] for documentation generated by [FORD] from the f
 
 ## References 
 Although fortran-lang is _not_ interface-compatible with any of the following libraries, each contains documentation that might be useful for different reasons:
-- **Recommended reference:** The [scipy.fftpack] documentation contains succinct description of the storage sequences for function results that match those in fortran-lang/fftpack, e.g., the location of the real and imaginary parts of the `rfft` function result.
-- **Theory reference:** The [documentation for the GNU/gsl FFT routines], which are also based on netlib/fftpack, provides some useful definitions of FFT terminology and represenations of the analytical forms of the Discrete Fourier Transform nicely formatted by [LaTeX].
-- **Historical reference:** The [netlib/fftpack] library on which fortran-lang/fftpack is useful for understanding several fortran-lang/fftpack design choices, e.g., the procedure dependencies.
+
+* **Recommended reference:** The [scipy.fftpack] documentation contains succinct description of the storage sequences for function results that match those in fortran-lang/fftpack, e.g., the location of the real and imaginary parts of the `rfft` function result.
+* **Theory reference:** The [documentation for the GNU/gsl FFT routines], which are also based on netlib/fftpack, provides some useful definitions of FFT terminology and represenations of the analytical forms of the Discrete Fourier Transform nicely formatted by [LaTeX].
+* **Historical reference:** The [netlib/fftpack] library on which fortran-lang/fftpack is useful for understanding several fortran-lang/fftpack design choices, e.g., the procedure dependencies.
 
 [FORD]: https://github.com/Fortran-FOSS-Programmers/ford
 [project file]: ./API-doc-FORD-file.md