diff --git a/src/eddymotion/data/pet.py b/src/eddymotion/data/pet.py
index 415b477c..44a97b89 100644
--- a/src/eddymotion/data/pet.py
+++ b/src/eddymotion/data/pet.py
@@ -51,7 +51,7 @@ class PET:
     frame_time = attr.ib(default=None, repr=_data_repr)
     """A 1D numpy array with the midpoint timing of each sample."""
     total_duration = attr.ib(default=None, repr=_data_repr)
-    """A float number represaenting the total duration of acquisition."""
+    """A float number representing the total duration of acquisition."""
 
     em_affines = attr.ib(default=None)
     """
diff --git a/src/eddymotion/estimator.py b/src/eddymotion/estimator.py
index 148c769d..7efff9d0 100644
--- a/src/eddymotion/estimator.py
+++ b/src/eddymotion/estimator.py
@@ -64,11 +64,15 @@ def fit(
             Number of iterations this particular model is going to be repeated.
         align_kwargs : :obj:`dict`
             Parameters to configure the image registration process.
-        model : :obj:`str`
+        models : :obj:`list`
             Selects the diffusion model that will generate the registration target
             corresponding to each gradient map.
             See :obj:`~eddymotion.model.ModelFactory` for allowed models (and corresponding
             keywords).
+        omp_nthreads : :obj:`int`
+            Maximum number of threads an individual process may use.
+        n_jobs : :obj:`int`
+            Number of parallel jobs.
         seed : :obj:`int` or :obj:`bool`
             Seed the random number generator (necessary when we want deterministic
             estimation).
diff --git a/src/eddymotion/model/base.py b/src/eddymotion/model/base.py
index 59b7a863..e0e8d2e9 100644
--- a/src/eddymotion/model/base.py
+++ b/src/eddymotion/model/base.py
@@ -47,8 +47,6 @@ def init(model="DTI", **kwargs):
 
         Parameters
         ----------
-        gtab : :obj:`numpy.ndarray`
-            An array representing the gradient table in RAS+B format.
         model : :obj:`str`
             Diffusion model.
             Options: ``"DTI"``, ``"DKI"``, ``"S0"``, ``"AverageDW"``
diff --git a/src/eddymotion/viz.py b/src/eddymotion/viz.py
index a298d092..38d112b0 100644
--- a/src/eddymotion/viz.py
+++ b/src/eddymotion/viz.py
@@ -115,7 +115,7 @@ def draw_circles(positions, radius, n_samples=20):
     r"""
     Draw circular patches (lying on a sphere) at given positions.
 
-    Adapted from from `Emmanuel Caruyer's code
+    Adapted from `Emmanuel Caruyer's code
     <https://github.com/ecaruyer/qspace/blob/master/qspace/visu/visu_points.py>`__,
     which is distributed under the revised BSD License:
 
@@ -164,7 +164,7 @@ def draw_points(gradients, ax, rad_min=0.3, rad_max=0.7, cmap="viridis"):
     """
     Draw the vectors on a shell.
 
-    Adapted from from `Emmanuel Caruyer's code
+    Adapted from `Emmanuel Caruyer's code
     <https://github.com/ecaruyer/qspace/blob/master/qspace/visu/visu_points.py>`__,
     which is distributed under the revised BSD License:
 
@@ -184,7 +184,7 @@ def draw_points(gradients, ax, rad_min=0.3, rad_max=0.7, cmap="viridis"):
     gradients : array-like shape (N, 4)
         A 2D numpy array of the gradient table in RAS+B format.
     ax : :obj:`matplotlib.axes.Axis`
-        The matplolib axes instance to plot in.
+        The matplotlib axes instance to plot in.
     rad_min : :obj:`float` between 0 and 1
         Minimum radius of the circle that renders a gradient direction
     rad_max : :obj:`float` between 0 and 1