宋涛.21世纪世界社会主义新探索与马克思主义新发展．中册．挑战与应对：当今世界社会主义运动现状与前景．Challenges and responses: current situation and prospects of contemporary world socialist movement.人民出版社,2020.
宋涛.21世纪世界社会主义新探索与马克思主义新发展．下册．比较与借鉴：国外左翼看中国特色社会主义．Comparison and reference: socialism with Chinese characteristics in the view of left wing forces outside China.人民出版社,2020.
21世纪世界社会主义新探索与马克思主义新发展．下册．比较与借鉴：国外左翼看中国特色社会主义．Comparison and reference: socialism with Chinese characteristics in the view of left wing forces outside China
