将 LyX 中的引用样式从数字改为作者年份

Question

我试图将引用样式从numeric改为author-year但它不知何故保留了两者（Pyke 等人 [4]）。如您所见，它不显示年份，只显示 ID 号。我尝试将参考书目样式更改为plainnat此处推荐的样式，但没有帮助。

有什么建议么？

谢谢！

例子：

#LyX 2.1 created this file. For more info see http://www.lyx.org/
\lyxformat 474
\begin_document
\begin_header
\textclass elsarticle
\use_default_options true
\maintain_unincluded_children false
\language english
\language_package default
\inputencoding auto
\fontencoding global
\font_roman default
\font_sans default
\font_typewriter default
\font_math auto
\font_default_family default
\use_non_tex_fonts false
\font_sc false
\font_osf false
\font_sf_scale 100
\font_tt_scale 100
\graphics default
\default_output_format default
\output_sync 0
\bibtex_command default
\index_command default
\paperfontsize default
\spacing single
\use_hyperref false
\papersize a4paper
\use_geometry true
\use_package amsmath 1
\use_package amssymb 1
\use_package cancel 1
\use_package esint 1
\use_package mathdots 1
\use_package mathtools 1
\use_package mhchem 1
\use_package stackrel 1
\use_package stmaryrd 1
\use_package undertilde 1
\cite_engine natbib
\cite_engine_type authoryear
\biblio_style plainnat
\use_bibtopic false
\use_indices false
\paperorientation portrait
\suppress_date false
\justification true
\use_refstyle 1
\index Index
\shortcut idx
\color #008000
\end_index
\secnumdepth 2
\tocdepth 2
\paragraph_separation indent
\paragraph_indentation default
\quotes_language english
\papercolumns 1
\papersides 1
\paperpagestyle default
\tracking_changes false
\output_changes false
\html_math_output 0
\html_css_as_file 0
\html_be_strict false
\end_header

\begin_body

\begin_layout Section

\end_layout

\begin_layout Standard
Many of those retailers soon realized what 
\begin_inset CommandInset citation
LatexCommand cite
key "Ricker(1999)"

\end_inset

wrote just couple of months before: "It is here - in the down and dirty
 details of consumer direct order fulfillment - that the epic battles for
 domination of the e-Commerce marketplace will ultimately be won or lost".

\series bold
\color red

\end_layout

\begin_layout Standard
\begin_inset CommandInset bibtex
LatexCommand bibtex
bibfiles "Bibliography"
options "plainnat"

\end_inset


\end_layout

\end_body
\end_document

参赛号码为：

@Article{Ricker(1999),
  Title                    = {Order Fulfilment: The Hidden Key To E-Commerce Success},
  Author                   = {Fred R. Ricker and Ravi Kalakota},
  Journal                  = {Supply Chain Management Review},
  Year                     = {1999},
  Pages                    = {60-70},
  Volume                   = {Fall},

  Owner                    = {HP},
  Timestamp                = {2015.03.10}
}