中国科学院数学与系统科学研究院期刊网
Some Applications of Generalized Mountain Pass Lemma
Feng Ying LI, Bing Yu LI, Shi Qing ZHANG
Acta Mathematica Sinica, Chinese Series . 2018, (3): 511 -518 .  DOI: 10.12386/A2018sxxb0045