Petrick S W
J S Afr Vet Assoc. 1977 Oct;48(3):151-4.
Various parameters in the life cycle of mammals were investigated to find a possible correlation between these parameters and the life-span. Twenty-two factors were calculated to determine the true life-span of any mammal. In addition a single formula, by means of which the life-span could be determined, was constructed. The life-spans of certain species, as calculated by means of the formula, are compared with authorative estimates.
对哺乳动物生命周期中的各种参数进行了研究，以找出这些参数与寿命之间可能存在的关联。计算了22个因素来确定任何哺乳动物的真实寿命。此外，还构建了一个可以用来确定寿命的单一公式。通过该公式计算出的某些物种的寿命与权威估计值进行了比较。
