Erratum: Feng, X., et al. Gas Multiple Flow Mechanisms and Apparent Permeability Evaluation in Shale Reservoirs. Sustainability 2019, 11, 2114

The authors did not notice during the proofreading phase that we have accidentally deleted a related reference of Figure 1. The authors wish to make the following corrections to this paper [1]:

The title of Figure 1 was originally:

Figure 1. Gas multiple flow mechanisms in stimulated shale reservoir (modified from Wu et al. [31] and Chong et al. [39]).

The title of Figure 1 should be replaced with:

Figure 1. Gas multiple flow mechanisms in stimulated shale reservoir (modified from Wu et al. [31], Fan et al. [38], and Chong et al. [39]).

Fan et al. [38]. Analytical model of gas transport in heterogeneous hydraulically-fractured organic-rich shale media. Fuel. 2017, 207, 625–640, doi:10.1016/j.fuel.2017.06.105.

The authors would like to apologize for any inconvenience caused to the readers and the authors of the related reference by these changes. The manuscript will be updated, and the original copy will remain online on the article webpage.