fixed Issue #20 in JOSS paper

paper/paper.bib

@@ -55,7 +55,7 @@ @article{Frederiksen:2000
 
 @book{Kennett:1983,
     author = {Kennett, B L N},
-    booktitle = {Seismic wave propagation in stratified media},
+    title = {Seismic wave propagation in stratified media},
     publisher = {Cambridge University Press},
     year = {1983}
 }

paper/paper.md

@@ -55,7 +55,7 @@ allows wrapping low-level Fortran routines for speed while maintaining flexibili
 and ease of use for code interaction and plotting. The integration of ``obspy`` 
 [@obspy] ``Stream`` objects allows flexibility in manipulating and visualzing 
 the resulting seismograms. The software contains a wide range of elastic stiffness 
-definitions extracted from the literature (@Brownlee:2017) to accurately represent 
+definitions extracted from the literature [@Brownlee:2017] to accurately represent 
 seismic anisotropy due to various mineralogies and rock types. The software also 
 accurately models acoustic reverberations from an overlying column of water, 
 effectively simulating ocean-bottom seismograph (OBS) station recordings. 
@@ -64,7 +64,7 @@ The software will be useful in a variety of teleseismic receiver-based studies,
 such as P or S receiver functions, shear-wave splitting from 
 core-refracted teleseismic shear waves (i.e., SKS, SKKS), etc. It may also be the 
 starting point for stochastic inverse methods (e.g., Monte Carlo sampling) and more
-general (i.e., point) sources through slowness integration (@Frazer:1984}. Common 
+general (i.e., point) sources through slowness integration [@Frazer:1984]. Common 
 computational workflows that reproduce published examples [@Audet:2016; @Porter:2011] 
 are covered in the Jupyter notebooks bundled with this package. These notebooks 
 can be further used in a teaching environment to study the effects of seismic wave