Ma, P., Guan, J., Tang, Y., Xu, Y., & Su, Y. (2016). ψ-Contraction and [Formula: See text] -contraction in Menger probabilistic metric space. Springerplus.
Stile di citazione ChicagoMa, Pengcheng, Jinyu Guan, Yanxia Tang, Yongchun Xu, e Yongfu Su. "ψ-Contraction and [Formula: See Text] -contraction in Menger Probabilistic Metric Space." Springerplus 2016.
Citazione MLAMa, Pengcheng, et al. "ψ-Contraction and [Formula: See Text] -contraction in Menger Probabilistic Metric Space." Springerplus 2016.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.